I have been pasting back in my old version of the Css file to my custom theme that seemed to go missing during the upgrade (see previous topic I raised yesterday).
Just some more info on this - I can't get the class to work for my buttons class="asheader asmodheader asroundall" as detailed in this article which was working before upgrade.  http://www.activemodules.com/active...e-actions/

hope this helps with investigations.

Which CSS file are you editing? We often suggest that you make changes to the skin.css file, as it will not get overwritten when you upgrade the module. As long as you are using the same syntax as before, the css should still work for those buttons though.