That's what I did and everything seems to be working fine now (knocking on wood). Had the same problems (duplicate songs, titles/artwork with no music, etc.). Here's what I did/am doing now:
1. Wiped SD card with a fresh format.
2. Turned off Sync in Windows Media Player (only use copy-paste in Explorer now).
3. Rip mp3's with WMP.
4. Add/edit metadata/artwork using Mp3tag software (
Mp3tag - the universal Tag Editor (ID3v2, MP4, OGG, FLAC, ...))
5. Copy and Paste each mp3 file to SD card
one at a time and wait about 20 seconds between each copy-paste. Slow, but it's working.