Yes, it's widespread. Though some seem lucky enough to avoid it, but I haven't had much luck, and no version of the PSP game is apparently safe (the bugs are still there in the Euro version).
Cobra, the problems I have are several. Firstly, it crashes when I select my level 14 spell, so I can't use that or any spell after it because in order to get to 15+ you have to scroll the cursor past 14. So that renders the game pretty shitty in and of itself. The companion bug is no big deal because those bonuses you miss out on are really minor, but... when attempting to select a 6th spell from my spell list, I can't. I can have five spells only. When I began the game 6 was possible, but at one point I decided to switch one spell for another, only to find the 6th spell could not be reselected. This is not the extent of the bugs, either. There are several others relating to building stuff and relating to capturing creatures/mounts.