Bad to plug in while in sleep?

Well today I had my iBook in sleep mode and then plugged in the power adapter. when doing so the iBook woke up and went back to sleep (flashed on / off). Upon opening up my iBook i got an error msg stating to plug in the iBook before the battery dies yet i had 100% battery power. Then my Airport failed to see my network. I had to turn off airport and then turn on to make it work again.

Has this happened to anyone else???

Can't say that it has, and I've charged my iBook plenty whilst it's sleeping. Perhaps that message showed up before you had plugged it in? I know when I open up my iBook after it's been charging/sleeping it'll show the same batt power before it was plugged in, then jumps right back up as soon as the RAM is refreshed.

no, it was already charged up and i just use the AC Power when i'm stationary. I had just got home and I opened it up to use it then closed it. The power was at 90%. I plugged in the AC and saw the "flash" and heard the HD move. A little while later I unplugged it and went out....opened it up and got the warning telling me I must plug it in before data loss, etc... then also noticed my Airport not working right (could not find current network). I just turned off Airport and turned it back on and it found the network... To be on the safe side I did a re-start and everything is fine now.

oh well must be a fluke...