What kind of bass is it?
If you look on some basses, the strings thin out when they reach the bridge. I'll post a pic soon.
The thinner it is at the bridge, the better it settles. It's really nothing to worry about. The intonation will be fine, it's just that with the thinning, the intonation would be BETTER.
-Mark
EDIT: Here's what I'm talking about.
