i found a major one!

its about the hounted objects (blue pke-meter)!
by now i have collected all the hounted objects in the game and they are all in the firehouse! even when im in the firehouse when playing an earlyer level again!
the problem is when looking for this objects in the pke-meter!
there are only this objects, i have collected at that time!
kinda bug, dont u think?

an other one was at the beginning of the libraby level!
i was looking for the ghost in this wooden thing and nothing happens!
i fount out that i first have to “activate” all the “talking” up on the balcony before the ghost appears!

The second thing isn't a bug. Its a scripted event and is working as intended. While I don't agree with the logic behind the event, it's meant to progress the story.

I found a weird bug last night. I was in the library level and I had out my pke meter. It was right after you beat the first book golem and you head towards the stairs. I had the pke meter out and was trying to scan the grey lady, but the screen glitched when I put up my pke meter. The entire screen was black, as if the lights had turned out. When I go back to the pke meter, everything is kind of ok, except that the pke meter was turned off, like no green lines and the wings didnt extend any. So I reloaded last check point, and when in third person mode, the color was gone. it wa all black and white. I solved the problem by hard booting my xbox.