Yoyofr has posted a notice on his website concerning about the save state function not working on 2.0 PSP.

The solution is to delete the logo.bmp, and replace it with the bmp from the previous version, or a 480*320 8bpp bmp file made by yourself. The issue should be fixed by this method. The solution was first discovered by thecradle on Snes9x TYL official forum.