IE11 Problems

Hi all

i have some problems with IE11. When i start our Vaadin 6.8.17 application locally in JBoss EAP 6.4 everything works fine. The generated css looks good:

When I login into the same application running on our Testsystem (Windows 2012 & JBoss EAP 6.4) the generated css looks different

And with this css some Buttons will not be rendered.

Both times i use the same IE11. Does anybody have an idea?

regards
Angela

The AbstractApplicationServlet returns different Browsers for the local and test environment, even if i use the same!

local:

08:47:25,321 INFO [ch.bls.dop.web.VaadinAppServlet] (http-/127.0.0.1:8080-2) Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; rv:11.0) like Gecko 08:47:25,321 INFO [ch.bls.dop.web.VaadinAppServlet] (http-/127.0.0.1:8080-2) null 08:47:25,321 INFO [ch.bls.dop.web.VaadinAppServlet] (http-/127.0.0.1:8080-2) getBrowserMajorVersion 11 08:47:25,321 INFO [ch.bls.dop.web.VaadinAppServlet] (http-/127.0.0.1:8080-2) getBrowserMinorVersion 0 08:47:25,321 INFO [ch.bls.dop.web.VaadinAppServlet] (http-/127.0.0.1:8080-2) isIE true 08:47:25,321 INFO [ch.bls.dop.web.VaadinAppServlet] (http-/127.0.0.1:8080-2) isWindows true test environment

08:45:33,824 INFO  [ch.bls.dop.web.VaadinAppServlet]
 (http-/172.27.21.81:8080-3) Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.1; WOW64; Trident/7.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; .NET4.0C; .NET4.0E; InfoPath.3; Zoom 3.6.0)
08:45:33,824 INFO  [ch.bls.dop.web.VaadinAppServlet]
 (http-/172.27.21.81:8080-3) null
08:45:33,824 INFO  [ch.bls.dop.web.VaadinAppServlet]
 (http-/172.27.21.81:8080-3) getBrowserMajorVersion 7
08:45:33,824 INFO  [ch.bls.dop.web.VaadinAppServlet]
 (http-/172.27.21.81:8080-3) getBrowserMinorVersion 0
08:45:33,824 INFO  [ch.bls.dop.web.VaadinAppServlet]
 (http-/172.27.21.81:8080-3) isIE true
08:45:33,824 INFO  [ch.bls.dop.web.VaadinAppServlet]
 (http-/172.27.21.81:8080-3) isWindows true
08:45:33,824 INFO  [ch.bls.dop.web.VaadinAppServlet]
 (http-/172.27.21.81:8080-3) browser.toString com.vaadin.terminal.gwt.server.WebBrowser@403b0c20
08:45:33,824 INFO  [ch.bls.dop.web.VaadinAppServlet]
 (http-/172.27.21.81:8080-3) <meta http-equiv="X-UA-Compatible" content="chrome=1"/>