I upgraded a 5.10 install to 6.4 (then 6.5) and I'm noticing something strange. If I turn on the "Optimize CSS" feature the the Color module tries to load its graphics from /color instead of /files/color. Also, the Fivestar CSS doesn't get included in the aggregated CSS files.

I turned off all modules except for core modules and tried again and got the same result for the Color module.

What could this be?