New answers tagged internet-explorer
I agree with PirateEric... Check that they are NOT using the 64-bit version of IE, it doen't support many active x controls. I had a user lose the Open in Access button, when we tried it in the 32-bit IE it worked. Others will say do a repair of Microsoft Office. If your disabled buttons are Office related, it may fix it too.
in this article you can read the different levels of Web Browser Support by SharePoint: http://technet.microsoft.com/en-us/library/cc263526(v=office.14).aspx#browserdetail This is a nice thread about the IE10 compatibility: http://social.technet.microsoft.com/Forums/en-US/sharepointgeneralprevious/thread/d806c08b-ec61-4639-9798-3e16a81c58e2
You can press F12 to bring up the developer tools and then try changing both the Browser Mode and Document Mode. In particular, try changing the browser mode to Internet Explorer 10 Compatibility View and the document mode to Internet Explorer 8 standards. For more information see this link
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