Using v2.0.1 build 2217 on OSX 10.7.5.I've customized the tab images used in my preferred theme and they work just fine until I reboot the machine. After a reboot, the tab images reset back to the old images... which is really weird.
I was using the SodaDark theme. Switching to another theme seemed to fix it for the time being. I'll confirm after the next reboot.