Developer Dark AleX has announced the release of version 2 of his PspStates homebrew plugin for the PSP Slim.
In case you weren't around during our earlier report, this homebrew plugin will enable you to create savestates while playing games on your handheld. As for the changes that are implemented with this new build (quoting the readme):
* Fixed important bug in inter-thread code (semaphore wasn't waiting due to interrupts disabled), that caused the load state to not be completely read in some cases. This caused black screen after state load (unless you just saved that state, in this case state was still in ram), or even worse, game not working properly due to partial load.
* Added states per game basis. The controls are slightly different: old controls now do a local savestate/loadstate of the game, while pressing additionally select button will save/load a global state. See instructions for more info.
* Fixed bug that caused normal sleep mode waking up immediately.
* UMD discs and isos in normal UMD mode are now supported. However, they require to nullify umdcache, by flashing one file, read the instructions in the readme.
More at the source.