Include Android Market app update
Android Market app update from 2.x.x to 3.x.x went from 1.6mb to 7.6mb and FUBAR older smartphones without space left to install it, thus keeping other apps from updating.
While 3.x.x has some new features it is not as easy to navigate as 2.x.x - and there's lots of Google enquiries about restoring the old version-2, and how to prevent it from updating.
There is problem too that lots of people now cannot see a full list of their installed apps from Google Market - when they are installed and working but not shown in the list. It appears that Google did something untoward to their databases at the launch of version-3.
UI on 3.x.x now starts with a page of adverts, and may not install properly - despite clearing the cache and data for the market and market updater, all I've got is a a button that says "user apps will appear here".
Titanium Pro fails to restore Market Links in market 3.1.5 - it never did work well, but maybe there's database confusion caused by two additional instances - in the Appbrain Market and Cyanogen database lists of installed apps.
On the other hand Google may be deliberately disabling things, making them not work, because it may be that Google just wants to start to re-exert control over their Google Market ?