force database/entry tag refresh

Because i play around a lot with my files and tags i've found that
some times rhythmdb values are out of sync with the actual tag of the
file.

When does rhythmbox check file tags? only on import?
When you update the file tags within rhythmbox does it update tags immediately?

One option is i should update tags when i update entries. At the
moment I'm using eyed3 to verify/update tags to v2.4.

It would be better to use whatever rhythmbox does to update tags but i
haven't looked into that yet.

Cheers,
Lachlan