Worth reporting certainly. Probably a freak occurrence on your end though. Try to see if it's reproducible if you don't mind (as long as you're running in a window you should be able to kill the process fairly easily.). RPGMaker accesses a lot of its assets as needed, rather than loading all at once, so it can be humming along fine and then try to load a png and if there's some kind of read error due to a failing disk, bad permissions, bad naming etc that can bring it all to a halt.