Oooh - I just fixed my install!!!
I'm a bit of a linux noob but as you can see from my last post I was struggling with a similar problem, and tried all the suggestions (ended up with KDE installed too just to try and get mi titlebars back)...
I eventually found that in my start-up programs, an app called "Devilspie" was selected to initialise with the system... apperently its a utility for simplyfing the display to multiple monitors.... I don't remember installing anything like this so I'm not sure where it came from, or if it was just something I clicked as an option somewhere...
Anyway, long-story short, removed that from the startup processes "SYSTEM>Preferences>Startup Applications" and restarted the computer, and now I've got title bars again!
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