The megaman one was mine, and it works fine in 0.99.92. I think it's the best workaround so far, except that there is a bug (I believe with Construct) where it will randomly add a single extra line of pixels at some points of a sprite, even though the display height/width says it didn't. It's only one extra line, so it's not noticeable at all, and I didn't catch it until someone pointed it out to me.
It's your graphics card settings. I don't know about ATI, but if you have an NVIDIA card, open up the NVIDIA control panel and on the "Adjust image settings with preview" panel, change it to "Let the 3D application decide." I'm too lazy to look it up for ATI, but I'm sure the settings are similar. This should be done anyways, because letting NVIDIA choose settings can give funky results in quite a few programs (Blender, for instance).
I know this isn't ideal because this has to be done on anyone's PC that doesn't have this option selected. Just remember to put it in the FAQ section of your Readme!
Best of luck, my friend :D