I am having a very wired problem with calendar extender from ajax control toolkit in Opera. It's working fine in Chrome but in OPERA when I click on the image button to open calendar it will causing a post back and page get refreshed (calendar isn't opening).
If the page is simple page its working but if its a content page from a master page then the problem is there (for Opera).
(Posted on behalf of the OP).
I resolved the issue. I was missing a JavaScript function which is called from server side and bind to scriptmanager.