Hey mally ! Hmmm that looks real strange... Have you been messing with The alphablending or semi transparency for those images in Sks ? -I´m not at all sure that´s the case here just guessing wildly... And it´s the perpixels you say...hmmm...
Thanks for your replies everyone! Yes, it's the per pixels section of the blind I'm stuck on with those borders. I don't think I've messed with either alphablending or semi-transparancy, but if I did, and they didn't do anything, I'd have set them back to where they were. Right now, I can't find where the settings are located. Here is the code for the left button:
The tile boxes for all 4 borders remain unchecked.
Do you have the box checked that says: the alpha channel in this image is premultiplied?
That box on all 4 borders is also unchecked.
If your frames have more than 1 layer, check the blend mode.
Just 1 layer on these 4 borders, so the blend mode is greyed out. That did bring to my attention, though, that on the 2 side vertical borders which are going transparent part of the time, "paint using margins" are all set to 0.