Just used Switch for the first time to convert MP3 files in my collection from 320KBps to 160KBps to squeeze them all onto my IPod. It worked fine when I made the output directory different to the source, but when I tried to make the source and output directories the same in order to simply overwrite the originals, Switch processed them all extremely quickly, and when I looked at the files they were all about 8-14KB in size. When played the are still mp3 files but the have just a fraction of a second of music in them.
So in a nutshell :
If you convert files to the same directory having the same name, Switch wipes them completely and leaves behind a bunch of useless files.
Good job it was Sting & The Police's Greates Hits !
Cheers
Blewyn