sometimes Photoshop (Intuos 4, AMD Phenom2 X6 1100T@3.333GHz) draws a hard line at full pressure instead of a soft, dynamic curve. It simply connects the starting and ending point. Painting ia 20000x14000@16GB Ram with PS using 12GB, painting size 6GB.
I also experienced when going back history states with ctrl-alt-z the tool automatically switches to zoom, and sometimes history just jumps back to the latest state.
Could this be a history lag? Any chance to fix this?
That usually means that something interrupted the flow of events to the application - like an OS hang or a glitch in the tablet driver.
Photoshop normally queues mouse/tablet events and might get behind, but doesn't lose events.
Before upgrading my machine and OS from Win7 to Win8 I had a similar problem, which was that the same thing happened, but there was part of that straight line missing. So there was a dot, break, and then the straight line. In between lies a new OS plus new hardware.
So you suspect it's a Wacom bug?