When it rains, it pours. Fresh from upstream, its Murrine 0.41.
Get the testing deb!
NOTE: This is a 32-bit package, maybe sometime I or someone else will get around to cross-compiling it.
Changelog:
0.41
===
* New option, hilight_ratio = 1.0 (it’s a double) to select the amount of hilight you want. Useful with dark themes that lacks on hilight (set hilight_ratio = 1.15 or more) or you
can simply decrease the hilight (set hilight_ratio = 0.909090 to have a flat theme!!! Less to emulate something similar to the concave style, useful to make concave style on roun
ded themes)
* Fixed bug that prevents using different options in different widgets (e.g. you can have different roundness on buttons and menuitems if you edit gtkrc by hand)
* Fixed a rendering bug on scrollbar steppers
* Added retrocompatibility to old themes before 0.30 release
* Now arrows on combobox and optionmenu use text color (good for dark themes)
* Improved things here and here 
* Reformatted code here and here
With luck and great skill, Murrine will soon be in the Ubuntu Universe repository so look for it in Feisty.