Very strange, i must say... i didn't see anything like this in my games after making those changes.
First suggestion is, review all the changes you did. There is allways the posibility of misstyping something. I hope you commented every line you changed, to make it easier to find.
May be someone else who saw any problem like this can suggest more.
I really find it very strange, because the variables that i suggested to change don't have nothing to do with poluttion.
Let us know if you find something out.