Icons aliased & themes broken after 15.04 upgrade

[Pat_Miller]

Upgraded to 15.04 this morning, and I'm having two annoying issues in Unity:

1. All icons are aliased unless in their native resolution:
http://s13.postimg.org/o8xrpob53/Selection_004.jpg

2. My previously beautiful themes are now all...screwed up looking:
http://s21.postimg.org/5r78rzasn/Selection_005.jpg

I've tried switching between my Intel & Nvidia graphics, purging the themes, and I can't get it to look right!
The default themes look fine, but default icons are also aliased.

I also got this error when reinstalling the themes:
gtk-update-icon-cache: The generated cache was invalid.

[buzzingrobot]

Themes: Check the themes are compatible with the GTK version in 15.04 (3.14).

[Pat_Miller]

Could very well be it...how long has 3.14 been out?

[Frogs Hair]

15.04 includes 3.14 , but it has been available on other distributions since last September. Due to timing it didn't make into 14.10.