Sony has officially announced that certain Playstation One and PS2 titles are running into problems mostly with reports of screens freezing or background music related issues.
They have also put up a support site and i checked the details of a few games which have run into problems.
Also links to the support site and press release etc, albeit they are in japanese only.
Just this morning i replied to wraggsters post that am gonna update to firmware 3.0 for my PSP to enjoy EMULATION, now i am having some serious reconsideration here.