The last thing I did with it is watch a video in Moonshell. I stop the video and turn off the DS. A few minutes later I turn the DS back on and the lettering in YSMenu is mirrored. All the letters are backwards. So far from troubleshooting I've been able to figure out it's only YSMenu that does it, not the DSTT menu, and replacing the system files didn't fix it. Until I have more room on my hard drive, I won't be able to reformat. That probably will fix it, but it's weird that it's only YSMenu. I'm chkdsking it now. I've also tried moving all the files to a folder on the card and then moving them back.