it's possible you already had the market version 2.3.4 installed. if that is/was the case, for some putting that version over itself makes it go poof. it's very very frustrating. try this, if you made a backup before flashing this, get that up and running and see if you can uninstall updates to the market or go into TiBu and freeze it (thanks to Stetsonaw for this info, it's also in his EpicBlue threads) then reflash the theme. that should take care of it. if it doesn't let me know.