[xwiki-devs] debugging sheets applications

Hello fellow developers, we have met a fairly hard bug on www.curriki.org which has almost delayed our release and required a last minute removal of our new discussions feature: the trigger of the sheet application has not been consistent. It has been inconsistent between servers (development, staging, production) and has been inconsistent between syntaxes. For a while I thought that the lack of the class XWiki.ClassSheetBinding was guilty, but adding it did not change anything. I then went through the XWiki core pages and added as much as possible that could have something related… then it started to work on pages in old syntax but failed with newly created pages (which are copies of a template page). Where could I look to debug this? There seems to be *something* applied, since the rendered page is empty and the content is ignored. Thanks for hints. Paul PS: we're now running xwiki 3.5.1