I just noticed last night that the plastic case on my iBook is cracked, and looks like it might be spreading. What is the best thing to do about it? I was thinking about just putting some glue on it, but would this be a good excuse to buy a MacBook or iMac? I also think a MacBook will fit better into the $20 Timbuk2 bag I scored last night...

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1999 Toyota Corolla VE (Mine)
2006 Honda Odyssey (Wife's)
1979 300CD (sold)