music can be a problem if you had a custom song on, then took a new one and replaced it. tho it shouldnt freeze. i would say make sure your sd card isnt locked. if needed, remove all hacks and add them bit by bit just to see if anything causes freezing
I've been making lots of music hacks, and I haven't been getting any freezes from importing BRSTMs.
Also, I read somewhere that using custom music can degrade a memory card... is this true?
I don't believe custom music can degrade a memory card.