Created attachment 103387 [details] Jagged lines Regardless of the brush engine, drawing quick lines causes a weird jagged edge to the line. I've tried changing the scaling mode, and it doesn't change much; I've tried disabling instant preview; I've tried enabling and disabling basic smoothing, I've tried in openGL and out of openGL. This happens on both my laptop and my desktop, both run OS X. It's not a question of hardware because both run the software amazingly when booted under Fedora.
*** This bug has been marked as a duplicate of bug 373676 ***