I had the similar problem... but it was "operator error"
First, if the mygig hard drive memory is "full", it will import music and pictures, but cannot save it.
To check the MYGIG hd: push the MENU button, touch MANAGE HD, touch DISPLAY HARDRIVE MEMORY, a few seconds later it will display the memory capacity. If it has less than gb of memory and the cd is 3gb, it obviously will not be saved. My hd memory is 15gb enough to hold 1,242 of my songs.
Second, Push MENU, touch SYSTEM INFORMATION, under GRACENOTE, it should say 834, under SOFTWARE it should say 9.235 ..... any low numbers and you are due an update.
Third, listen to your music files, touch MUSIC STYLES, touch ARTIST, then search for the artist you lost. Touch JUKEBOX and look for the cd of the artist that was lost.
If there is a problem with the mygig, it will display "ERROR". satan (dealer) want $195 to use the starcan machine to update the mygig.
2008 Sport Liberty
Cold air intake*Trush (magnaflow) turbo muffler* Hypertech power program*
Hood Prop mod. Battery Quick Release mod.
Resonator removed (sounds like a V8 on start up)