I've just upgraded one of our dev apps to v1.2.4 from v1.1.0 using private synonyms. When I try and run a page, it does "loading page layout" for a while then just shows a blanks screen. The firebug Console Errors show
TypeError: c.menu is undefined
ext-all...v=1.2.4 (line 15, col 712133)
Do you have any ideas what's going on?