BUILD: 3.7.08B(GL64)(trial)
OS: Mac OS 10.8.1 "Mountain Lion"
HARDWARE: iMac 2.5Ghz Quad Core i5, AMD Radeon HD 6750M 512 MB graphics
BUG DESCRIPTION: Have been testing the trial for possible purchase. Since upgrading from OS 10.7.4 "Lion," I can no longer see the yellow GL brush circle in the retopo room, nor the white lines rendered in realtime using "Quads" or "Add/Split." I can still create polygons using these tools, but I have to do it "blind" and as such it cannot be used in my projects reliably.
STEPS TO REPRODUCE: Load reference mesh into blank scene. Switch to retopo room. Activate "Add/Split" tool. Try to add a retopo polygon on the reference mesh. There should be no feedback.