MIM Fender bridge saddle slipping

[Espresto]

The saddle for the G string on my MIM P-bass has started slipping to the side, moving the string closer to the edge of the neck. How can I fix this?

[kedo]

replace the single groove saddle with threaded saddles. You can get all 4 for less than $20.00. With these, if you adjust the E and G saddles so that they are slightly angled (outer edge lower than inner), the string tension pulls the saddle inward.

I'm not describing this to well... hopefully someone else will chime in

[jay loren]

Originally Posted by kedo

replace the single groove saddle with threaded saddles. You can get all 4 for less than $20.00. With these, if you adjust the E and G saddles so that they are slightly angled (outer edge lower than inner), the string tension pulls the saddle inward.

I'm not describing this to well... hopefully someone else will chime in

Had the same issue and replaced the saddles. Here is a place that carries those threaded saddles:
http://www.guitarpartsresource.com/bass_saddles.htm

[trunkshope6]

Just wait for a vintage style threaded bridge to pop up cheap here,I've gotten the whole bridge for around 20 ,instead of buying individual saddles