Graphic Software Glitches

Are you using a well known graphics software and have come across a glitch? You can post it in here.
There is one thing I have found in Corel 12 that I'm having problems exporting PNG files as transparent. In Corel Photo Paint I can't even get it to work. In Corel Draw I only have one way I can go about doing it, the other way creates a very fuzzy image.
Have you found that software makers put out updates for glitches or do they not care if they're on a newer version now?

I've had issues with Photoshop randomly deciding that at certain points during my time using it (obviously when I'm hard at work) I seem to get some odd issue where the tools just don't seem to respond to me selecting them via my mouse. Randomly annoying and made worse by the fact that they seem to work with the key shortcuts instead. A quick restart of Photoshop seems to do the trick until the next time but it's insanely annoying how random of an error it is lol.