Some users are experiencing black rectangles appearing in their dygraphs, which seem to be triggered by hover events.
Using FireFox 38.0.5 on windows 64 bit machine.
I have the latest version of dygraphs - v1.2
Has anyone else experienced this and know of a cure?
Only recently become apparent, and some users have been using their graphs since 2011, so my guess is this may be linked to a Windows update.
Thanks.