Not so much a bug report as an observation...
When partial print came out, I did a test. I ran the game full screen and got around 15 FPS (1.6 Ghz single core CPU). I then turned partial print on and was getting around 100 FPS. However, the tradeoff for this was that menus were bad, as it did not update correctly most of the time. I could live with it though. However, today, I alt-tabbed while playing, then alt-tabbed back in, only to find that menu's now update perfectly. And I still get the FPS boost of around 85. (I was actually tabbing to post in the suggestion forum about turning partial print off in the menus, which is what it has appeared to have done).
I managed to reproduce it, but it might only be my computer. Or, I could have been the only one having the menu problem.
Any ideas on how this could have happened, or if it could be made the default.