ptran

For a test, I was flipping through some other Organic Chemistry I websites to find some extra practice problems for a test and I noticed at one it said that the stereochemistry of SOCl2 is retained when used with a nonpolar solvent like DMSO but when a polar solvent is used the stereochemistry is changed to the opposite. I really didn't think too much about it and come test time, I wrote in what I remembered from said website. My professor marked it wrong but didn't explain why. Anyways, I really can't remember what website it was but I was wondering if anyone could confirm this and/or perhaps send a link proving how it would work.