Another data point...
I've been experiencing the same thing and it's been driving me nuts because I haven't been able to figure out what's causing it! At first, I feared it had something to do with my company's Apache/PHP/MySQL/Javascript/Node.js/Socket.IO web app (also on Ubuntu) because I saw a lot of 408's coming from our customer's IPs. But then, I found one entry in the server logs where someone got a 408 browsing the website for our web app, as opposed to the web app itself:
Code:
82.194.219.xxx - - [20/Jan/2012:15:28:09 -0800] "GET / HTTP/1.1" 200 2752 "http://www.google.no/url?sa=t&rct=j&q=rundown%20program%20for%20tv%20production&source=web&cd=2&ved=0CCoQFjAB&url=http%3A%2F%2Fwww.rundowncreator.com%2F&ei=gfgZT_WoHIvY8QPP1eCVCw&usg=AFQjCNHY0cBhQcY-bvO6pfadAnOOhWDDYA" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_2) AppleWebKit/535.7 (KHTML, like Gecko) Chrome/16.0.912.75 Safari/535.7"
82.194.219.xxx - - [20/Jan/2012:15:28:10 -0800] "GET /Input.css?r=7 HTTP/1.1" 200 849 "http://www.rundowncreator.com/" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_2) AppleWebKit/535.7 (KHTML, like Gecko) Chrome/16.0.912.75 Safari/535.7"
82.194.219.xxx - - [20/Jan/2012:15:28:10 -0800] "GET /GoogleAnalytics.js?r=7 HTTP/1.1" 200 686 "http://www.rundowncreator.com/" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_2) AppleWebKit/535.7 (KHTML, like Gecko) Chrome/16.0.912.75 Safari/535.7"
82.194.219.xxx - - [20/Jan/2012:15:28:10 -0800] "GET /Functions.js?r=7 HTTP/1.1" 200 470 "http://www.rundowncreator.com/" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_2) AppleWebKit/535.7 (KHTML, like Gecko) Chrome/16.0.912.75 Safari/535.7"
82.194.219.xxx - - [20/Jan/2012:15:28:10 -0800] "GET /Style.css?r=7 HTTP/1.1" 200 1878 "http://www.rundowncreator.com/" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_2) AppleWebKit/535.7 (KHTML, like Gecko) Chrome/16.0.912.75 Safari/535.7"
82.194.219.xxx - - [20/Jan/2012:15:28:10 -0800] "GET /index.js?r=7 HTTP/1.1" 200 838 "http://www.rundowncreator.com/" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_2) AppleWebKit/535.7 (KHTML, like Gecko) Chrome/16.0.912.75 Safari/535.7"
82.194.219.xxx - - [20/Jan/2012:15:28:10 -0800] "GET /jQuery.js?r=7 HTTP/1.1" 200 33647 "http://www.rundowncreator.com/" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_2) AppleWebKit/535.7 (KHTML, like Gecko) Chrome/16.0.912.75 Safari/535.7"
82.194.219.xxx - - [20/Jan/2012:15:28:10 -0800] "GET /Rundown-Creator-logo-385-to-343x65.png HTTP/1.1" 200 4519 "http://www.rundowncreator.com/" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_2) AppleWebKit/535.7 (KHTML, like Gecko) Chrome/16.0.912.75 Safari/535.7"
82.194.219.xxx - - [20/Jan/2012:15:28:10 -0800] "GET /More-features-button-207x41.png HTTP/1.1" 200 7853 "http://www.rundowncreator.com/" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_2) AppleWebKit/535.7 (KHTML, like Gecko) Chrome/16.0.912.75 Safari/535.7"
82.194.219.xxx - - [20/Jan/2012:15:28:10 -0800] "GET /Plans-and-pricing-button-207x41.png HTTP/1.1" 200 7476 "http://www.rundowncreator.com/" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_2) AppleWebKit/535.7 (KHTML, like Gecko) Chrome/16.0.912.75 Safari/535.7"
82.194.219.xxx - - [20/Jan/2012:15:28:10 -0800] "GET /Screenshots/Slideshow-teleprompter-960x513.jpg HTTP/1.1" 200 74504 "http://www.rundowncreator.com/" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_2) AppleWebKit/535.7 (KHTML, like Gecko) Chrome/16.0.912.75 Safari/535.7"
82.194.219.xxx - - [20/Jan/2012:15:28:10 -0800] "GET /Screenshots/Slideshow-rundown-960x513.jpg HTTP/1.1" 200 78612 "http://www.rundowncreator.com/" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_2) AppleWebKit/535.7 (KHTML, like Gecko) Chrome/16.0.912.75 Safari/535.7"
82.194.219.xxx - - [20/Jan/2012:15:28:10 -0800] "GET /Screenshots/Slideshow-script-editor-960x513.jpg HTTP/1.1" 200 81354 "http://www.rundowncreator.com/" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_2) AppleWebKit/535.7 (KHTML, like Gecko) Chrome/16.0.912.75 Safari/535.7"
82.194.219.xxx - - [20/Jan/2012:15:28:10 -0800] "GET /Used-by-371x45.png HTTP/1.1" 200 9037 "http://www.rundowncreator.com/" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_2) AppleWebKit/535.7 (KHTML, like Gecko) Chrome/16.0.912.75 Safari/535.7"
82.194.219.xxx - - [20/Jan/2012:15:28:11 -0800] "GET /Favicon-Transparent-48x48.png HTTP/1.1" 200 1168 "-" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_2) AppleWebKit/535.7 (KHTML, like Gecko) Chrome/16.0.912.75 Safari/535.7"
82.194.219.xxx - - [20/Jan/2012:15:28:28 -0800] "GET /features/ HTTP/1.1" 200 3561 "http://www.rundowncreator.com/" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_2) AppleWebKit/535.7 (KHTML, like Gecko) Chrome/16.0.912.75 Safari/535.7"
82.194.219.xxx - - [20/Jan/2012:15:28:28 -0800] "GET /Screenshots/On-air-show-timer-446x327.jpg HTTP/1.1" 200 41148 "http://www.rundowncreator.com/features/" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_2) AppleWebKit/535.7 (KHTML, like Gecko) Chrome/16.0.912.75 Safari/535.7"
82.194.219.xxx - - [20/Jan/2012:15:28:28 -0800] "GET /Screenshots/User-management-622x470.jpg HTTP/1.1" 200 37132 "http://www.rundowncreator.com/features/" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_2) AppleWebKit/535.7 (KHTML, like Gecko) Chrome/16.0.912.75 Safari/535.7"
82.194.219.xxx - - [20/Jan/2012:15:28:28 -0800] "GET /Screenshots/TV-radio-rundown-software-622x470.jpg HTTP/1.1" 200 66498 "http://www.rundowncreator.com/features/" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_2) AppleWebKit/535.7 (KHTML, like Gecko) Chrome/16.0.912.75 Safari/535.7"
82.194.219.xxx - - [20/Jan/2012:15:28:28 -0800] "GET /Screenshots/Teleprompter-622x470.jpg HTTP/1.1" 200 51941 "http://www.rundowncreator.com/features/" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_2) AppleWebKit/535.7 (KHTML, like Gecko) Chrome/16.0.912.75 Safari/535.7"
82.194.219.xxx - - [20/Jan/2012:15:28:28 -0800] "GET /Screenshots/Chat-622x347.jpg HTTP/1.1" 200 54788 "http://www.rundowncreator.com/features/" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_2) AppleWebKit/535.7 (KHTML, like Gecko) Chrome/16.0.912.75 Safari/535.7"
82.194.219.xxx - - [20/Jan/2012:15:28:28 -0800] "GET /Screenshots/TV-radio-script-editor-522x541.jpg HTTP/1.1" 200 49598 "http://www.rundowncreator.com/features/" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_2) AppleWebKit/535.7 (KHTML, like Gecko) Chrome/16.0.912.75 Safari/535.7"
82.194.219.xxx - - [20/Jan/2012:15:28:29 -0800] "GET /Screenshots/TV-radio-rundown-software-on-iPad-and-iPhone-359x333.jpg HTTP/1.1" 200 24355 "http://www.rundowncreator.com/features/" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_2) AppleWebKit/535.7 (KHTML, like Gecko) Chrome/16.0.912.75 Safari/535.7"
82.194.219.xxx - - [20/Jan/2012:15:28:29 -0800] "GET /Browsers-500x128.jpg HTTP/1.1" 200 26525 "http://www.rundowncreator.com/features/" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_2) AppleWebKit/535.7 (KHTML, like Gecko) Chrome/16.0.912.75 Safari/535.7"
82.194.219.xxx - - [20/Jan/2012:15:29:27 -0800] "-" 408 0 "-" "-"
82.194.219.xxx - - [20/Jan/2012:15:29:27 -0800] "-" 408 0 "-" "-"
82.194.219.xxx - - [20/Jan/2012:15:29:27 -0800] "-" 408 0 "-" "-"
82.194.219.xxx - - [20/Jan/2012:15:29:27 -0800] "-" 408 0 "-" "-"
82.194.219.xxx - - [20/Jan/2012:15:29:28 -0800] "-" 408 0 "-" "-"
82.194.219.xxx - - [20/Jan/2012:15:29:28 -0800] "-" 408 0 "-" "-"
82.194.219.xxx - - [20/Jan/2012:15:30:08 -0800] "GET /about-us/ HTTP/1.1" 200 3009 "http://www.google.no/url?sa=t&rct=j&q=rundown%20program%20for%20tv%20production%20free&source=web&cd=5&sqi=2&ved=0CEQQFjAE&url=http%3A%2F%2Fwww.rundowncreator.com%2Fabout-us%2F&ei=5vgZT9e6GsfU8QOVpJiZCw&usg=AFQjCNG8iDbpTZMbXsD4xB0jByKqevxS2A" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_2) AppleWebKit/535.7 (KHTML, like Gecko) Chrome/16.0.912.75 Safari/535.7"
82.194.219.xxx - - [20/Jan/2012:15:30:08 -0800] "GET /Jeff-360x233.jpg HTTP/1.1" 200 48253 "http://www.rundowncreator.com/about-us/" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_2) AppleWebKit/535.7 (KHTML, like Gecko) Chrome/16.0.912.75 Safari/535.7"
82.194.219.xxx - - [20/Jan/2012:15:32:05 -0800] "GET /about-us/ HTTP/1.1" 200 3009 "http://www.google.no/url?sa=t&rct=j&q=rundown%20program%20for%20tv%20production%20free&source=web&cd=5&sqi=2&ved=0CEQQFjAE&url=http%3A%2F%2Fwww.rundowncreator.com%2Fabout-us%2F&ei=5vgZT9e6GsfU8QOVpJiZCw&usg=AFQjCNG8iDbpTZMbXsD4xB0jByKqevxS2A" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_2) AppleWebKit/535.7 (KHTML, like Gecko) Chrome/16.0.912.75 Safari/535.7"
82.194.219.xxx - - [20/Jan/2012:15:32:57 -0800] "GET /features/ HTTP/1.1" 200 3561 "http://www.rundowncreator.com/about-us/" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_2) AppleWebKit/535.7 (KHTML, like Gecko) Chrome/16.0.912.75 Safari/535.7"
82.194.219.xxx - - [20/Jan/2012:15:34:56 -0800] "GET /plans-and-pricing/ HTTP/1.1" 200 3225 "http://www.rundowncreator.com/features/" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_2) AppleWebKit/535.7 (KHTML, like Gecko) Chrome/16.0.912.75 Safari/535.7"
82.194.219.xxx - - [20/Jan/2012:15:34:56 -0800] "GET /PlansandPricing.js?r=7 HTTP/1.1" 200 581 "http://www.rundowncreator.com/plans-and-pricing/" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_2) AppleWebKit/535.7 (KHTML, like Gecko) Chrome/16.0.912.75 Safari/535.7"
Our website is pretty straightforward. There's nothing really crazy going on. So that leds me to believe that hoopycat must be right and it's a predictive browsing thing. Whew.