Simple theme that uses the styles.xml from here: http://forum.xda-developers.com/showthread.php?t=1590491 to make a CM9/CM10/AOKP/PA theme that replaces all the old Gingerbread UI parts with their Holo equivalents. Still confused? See these images:

Here’s the app ZipSigner, which uses the old Gingerbread styles, before the theme is applied:

And here it is afterwards:

See the difference?

What it does:

Fixes UI for older apps

Bugs:

Breaks drop down menus (like the one in the screenshot, labeled auto-testkey)

In some places there is black text where it should be white and it’s quite hard to read

 

Download:

From XDA Thread: http://forum.xda-developers.com/showthread.php?p=33643234