Unfortunately, Google Music does weird things with how it interprets my music. I'm really kind of crazy with how I tag and manage my music collection; I spent a long time last year going through every artist and album of 20 gigs of music, adding pictures, correcting metadata, etc.
When I upload things to Google Music, it botches things pretty terribly. For example, I use EasyTag to manage my library, and unfortunately, it doesn't support the Album Artist ID3 tag, only the Artist one. Google Music cues off of the Album Artist more than the Artist, so this often splits up albums.
And so, it's come to this. I could write a Python script that would traverse my music library, wiping my songs of ID3v1 tags and all other tags I'm not primarily interested in. Would there be any side-effects to this? Is ID3v2 pretty well supported?