Offtopic, of course, but I'll post here anyway...
I've been meaning to post a bug report about this - I can't get conditional breakpoints to work with Grails debugging. Regular breakpoints, fine, but conditionals... I get an error that "'this' is not available" when it hits the breakpoint.
Searched around - can't find any other reports of this, but it's been a problem since at least IntelliJ 12, and in the 13 beta that I tried - I don't have 11 around any more, but I could swear it used to work.
EDIT: added bug report: http://youtrack.jetbrains.com/issue/IDEA-117458 although it looks like it was reported and marked as 'fixed' in http://youtrack.jetbrains.com/issue/IDEA-100647. Still doesn't seem to work though.