Has anyone noticed Internet Explorer useragents changing in their access logs?
- - 12.345.6.789 - - [24/Feb/2012:15:59:59 -0800] "GET HTTP/1.1" 200 4759 "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.1; WOW64; Trident/5.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; InfoPath.2; AskTbMP3R7/18.104.22.16807)" - - 12.345.6.789 - - [24/Feb/2012:16:00:01 -0800] "GET HTTP/1.1" 200 4040 "Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0)"
Obviously I stripped down the log to just show the useragents. Just noticed this happening on our sites. Same user, same sessions, etc... Any thoughts?
Edit: We are using Amazon EC2. This has been found across three of our production servers that are behind a load balancer using a simple round robin - we have sticky sessions enabled. I should have left the pages being requested. The initial request is for the index page, the subsequent requests are for the assets. All other subsequent requests remain ( in this case ) IE 9.
I tried to replicate this with ie and compatibility mode, but my user agent stays on the version of ie I select from the developer tool.
Any chance this could be caused by the configuration? I've only found this with IE user agents but it could be others?