Tested in Google Chrome 19.0.1084.52 m on Windows 7 x64
Steps to reproduce:
Why was this closed? This is still occurring as of 1.2.
Sorry. I haven't been able to recreate with the steps aboved. I assumed a patch I had committed had fixed this issue. I've noticed your other issues regarding NaNs. I'll take a look at the issue more closely
This occurred yesterday. I was creating a theme for 1.2.