Assigning to Tom as he's mentioned work needs to be done for IE8 compatibility before in comments to JENKINS-23779.

Reducing priority as the software is no longer supported by the vendor, and all Windows versions still supported allow at least IE9 (with the exception of Server 2003).

Ahhh... thanks Daniel

Is there an official browser support matrix defined for Jenkins?

No. It's time though.

Internet Explorer 8 is bound to the lifecycle of the Windows version it is installed on.
IE8 for Windows7 it's still supported by Microsoft. (Many companies are still using this version.)

21% of users in the world (June 2014) are still using IE8
http://en.wikipedia.org/wiki/Internet_Explorer_8#Adoption

So I think IE8 support from Jenkins would be fine.

Right, it seems I misunderstood that part.

OTOH check the install stats, Windows XP still exists as well... we're never getting rid of it if considering how many have installed it

I'd have to wonder how reliable a source wikipedia is. Also, I think what counts more would be what the browser profile is of Jenkins users - I'd suspect it to be a more technical group and so instances of IE to be lower than the norm (whatever that is).

I think I have a solution to this issue (using respond.js - polyfills support for CSS3 media queries). Seems to work fine on the IE8 instance I'm testing against.

Running tests now.

So I guess this fix should appear in 1.577

Integrated in jenkins_main_trunk #3600
[FIXED JENKINS-23921] new <div>s layout doesn't work with IE8 (Revision 986a7a452e422a7fde2b8cd52c3d3f86345c0d53)

Result = SUCCESS
tom.fennelly : 986a7a452e422a7fde2b8cd52c3d3f86345c0d53
Files :

• war/src/main/webapp/scripts/respond.js
• war/src/main/webapp/scripts/msie.js
• core/src/main/resources/lib/layout/layout.jelly

With Jenkins ver. 1.577 on IE8, I always get the popup "Your Internet Explorer appears to be set to an non-default 'document mode'".
Is this intended?

Same here. Layout is fixed but the message is shown.

I tried with "IE7Standard" document mode: The message is not shown, but the page is not displayed correctly.
I suppose that the message is shown in the wrong case.

@Stephen Herter please attach screenshots

I have attached a screen shot from IE8 with "IE8Standard" document mode.
If the document mode is set to "IE7Standard", the warning message disappears. Contrary to my previous statement, the page is displayed correctly in this case.

@Stephen - so that sounds like there's no issue, right?

EDIT - Correction.... having read it again that does sound like it's not right Sorry.

Warning message showing up unexpectedly was filed as JENKINS-24550.