Hey,
When I buy music directly from the iTunes store on my iPhone, everything seems to work fine until I sync it with my computer. Once that happens, it deletes all the songs that I purchased from the iTunes iPhone store.
None of the songs already on my iPhone are affected, nor the songs I purchased from the main store are affected. I manually manage my music, so there is no auto sync erasing.
Any help?

Cheers,
Fino.

Is your computer authorized for itunes??? I did have this happen to me once where my computer was authorized but somehow it became deauthorized and thus it deleted over 20 or so apps..... had to then authorize it again and then download all the apps.... stupid iphone...