Lost all my music on Iphone IOS 6.0.1 AGAIN

After updating my Iphone 3GS to IOS 6.0.1 a couple of weeks ago, a few days later I lost all my Music content, the Music App showed "No Music". The Memory Available on Settings ("About") showed as if there all the music was lost, the memory available increased.

The first time I restored the IOS and sync everything again. That took me a few hours and I thought it was fixed. Now, a week later, the same thing happened AGAIN!

I read somewhere that there is file that is kind of FAT that could be corrupted and putting a new music on the Iphone, that would be reindexed and recovered. I downloaded a music from the Store but just add a new song, have not worked at all.

I can sync again and see if the musics will show again but the point is: now I will have to recover all my Music on weekly basics??? That would be a shame, to loose a couple of hours every week. My guess is that has to do with the IOS 6.0.1 because that never happened to me before.

Can someone tell me what is going on?

Regards