Testing matplotlib/examples/widgets/slider_demo.py on various backends, the bug fixed with #576 seems to have re-emerged since 1.3.1, or at least a similar phenomena.
I have tested slider_demo.py using the following backends:
@tacaswell Ahh, my mistake, I remembered seeing the triangles before on a standard release, it must have been from the previous time this bug occurred.
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mdboom commented on Feb 9, 2015
The first broken commit appears to be 91725d8.
Fix matplotlib#4074: Bug introduced in 91725d8
Merge pull request #4089 from mdboom/cairo-sliders
OceanWolf commented on Mar 4, 2015
@tacaswell Should this also go in the color overhaul branch as it fixes an issue introduced in 1.4.
tacaswell commented on Mar 4, 2015
@OceanWolf I don't think the change that caused this is on the 1.4 branch.
OceanWolf commented on Mar 4, 2015
@tacaswell Ahh, my mistake, I remembered seeing the triangles before on a standard release, it must have been from the previous time this bug occurred.
tacaswell commented on Mar 4, 2015
@OceanWolf No worries.