There have been a couple of fixes posted on here.
One is to buy a new extractor and install it.
The second one I've seen is to get a slightly larger ball bearing for under the extractor to take some of the slop out of the extractor.
For parts the extractor can be ordered from a number of online sites while the bb I saw mentioned was in a post from Sharpshooter and he's have them at his site.
http://www.sharpshootersupply.com/
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