Sometimes, if I click on a button nothing seems to happen and I have to click a second time.
• The Ajax request looks OK to me, the action in the backing bean is called and the Ajax response seems to be OK too. But the page in the browser doesn't change at all.
• The bug is always reproducible using the same steps in the sample application. With Internet Explorer the bug happens later than in other browsers, it needs more clicks than the other browsers. With all other browsers I have tried, I was able to reproduce the problem using the same steps.
• If I disable DOM diffing using org.icefaces.render.auto=false in web.xml the bug doesn't occur. But this is not a workaround for me because then I can't use the ICEfaces 1.8 components which I need to use.
• The bug occurs with both h:commandButton and ace:pushButton.
• I don't get a JavaScript error in the browser
• Another guy has got the same problem in a totally different application.
• For me this is a blocker issue

I'll shortly provide a sample application and steps to reproduce via Micha Kiener as I can't make the sample public.