Got a request today to publish out Cisco Jabber 10.5 in my XenApp 6.5 environment. While publishing it out, it errors on the icon having issues. Below is a screenshot of the error. I have seen this happen in the past with Firefox too.
So what's the fix you ask?
Apply the following Hotfix for XenApp 6.5 (CTX137747)
And for the people that are on XenApp 6.0 (CTX139340)