Yeah, I've finally got my PSP so I had a chance to play this porting and... I noticed several bugs, especially with the GPU. ARGH, Dracula kill me now!
1) GPU: colors suck. Yeah, colors are really bad and there is so much dithering with the pictures that it's disturbing. They could have used at least a better display mode, but they went with the crappy RGB555 for the filtered output;
2) GPU: line structures are WRONG. They miss the last pixel. Some emulators have this problem, but considering IGA used something like a simulated environment to make the Psp behave like a Psx drawing, he uber failed;
3) SPU: sound samples are WRONG. They play at different frequencies from the originals in most cases. Is IGA dub or something? How could he miss something THAT evident?
4) SPU/UMD: music doesn't loop correctly. It happened only once in the inverted castle's top. For some reason it didn't loop at all left Alucard in an astonishing silence;
5) GPU: missing or wrong effects. The shadow on the wall when walking on the lava pits is missing, totally. The other one is with Dark Metamorphose. When Alucard cannot heal anymore from blood, his border should turn transparent, but it becomes black. There's probably more stuff, but I can't remember atm;
6) Dub: some dialogues are totally off with the dialogues. Example when you first meet Maria, she leaves a couple of seconds before she actually says bye; O_o
7) Slowdowns: they happen mostly when there are several accesses to the Psx simulated VRAM, or in other cases for no reason at all. Terrible slowdowns when leaving an area in the "CD" room. Enabling the CPU to work at 333 Mhz somehow fixes the problem (even the after boss effect runs at 60fps O_o), but the game is supposed to work at 222 Mhz (or was it 266?), so shame on them.
I guess that's all for now. Anybody else with other "light" bugs? And for light I mean nothing like filling the map to 102485.97%.
PS: The new Maria is simply weak and stupid. :( Her sub weapons are nice, but she's way too weak compared to the Rondo counterpart. She also sucks in the boss battle at the centre of the castle.