What listings?
And what text files?
.loc files aren't text files, they are a specific db file format.
I'm pretty certain nothing changed in either text file nor loc file handling between 4.1.1 and 4.1.2...
I'm really sorry you guys seem to have such huge problems, I'd help if I could, but I have no idea what's causing them.
I'm pretty certain it's not caused by PFM as such, but from some underlying assumption about how TW handles the files which has changed recently (probably with TW:W which was when Radious and others started reporting weird crashes).