Are the tracks still checked in the name field. If not, command-click one check box and all of your tracks will get checked again.
My iTunes program has developed an odd issue in that it has stopped advancing to the next track when playing from within any or all of my 121 playlists or directly from the general Music playlist containing 5,265 tracks. I?ve always upgraded iTunes but only noticed this issue a day or so ago. I?m running iTunes 9.1 on a 2 Ghz PowerPC G5 with Sys. 10.5.8 and 8 MB of RAM.
Any suggestions and or assistance would be greatly appreciated.