Hi there ! Just jumping in too… After the major update got huge problems with TinyMCE Rich Text too… Did display a pure blank space with no icons, no cursor bar, nothing… ![]()
I did deactivate Syntax Highlightning and got back the interface but it was curiously not as “rich” as it were before. 
Well maybe the update of Rich Text did tone nown the interface a little (can’t tell since it wasn’t working until today) but clearly there is a problem with Syntax Highlightning too. Hope this can help someone, but I think there must be some other weird combo still out there… 