Stylus entered coordinates are wrong
On XP r10305 and all versions since gtk was updated in may.
First set of coordinates are entered with a normal mouse, second set with the Wacom stylus:
d="M 186.06633,473.62339 549.74144,337.0942"
When the error occurs, the following console output appears.
Sorry, I can't test with my Wacom mouse, it's broken.