A friend of mine has just installed 10.5.6 on their last gen. iBook. She left the iBook plugged in to the mains and came back to find that the iBook was alternating between the grey Apple screen and a light blue desktop screen where she could see the cursor. Sometimes it would also switch to a blue screen without a cursor. I've tried holding shift during startup - no effect. I've tried rebooting NVRAM - no effect. She has her discs, but not with her as she's away from home for Christmas. Any ideas? She's just been bought a new iPod Nano for Christmas and can't use it!