Apple has a bit of a history with hinge issues on their laptops.  The worst ever was the Powerbook 500 series.  I had a 540c in the late 90's and I had major hinge issues.

How hard can it be to make a good hinge?  Shame on Apple!
Mac mini C2D 1.83GHz - 2GB RAM - 200GB 7200rpm HD
Sawtooth w/G4 1GHz - 1GB RAM - SIIG SATA w/2x1TB HD
B&W w/G4 600MHz - 1GB RAM - 2x80GB HD
Sawtooth G4 400MHz - 512MB RAM - 40GB HD
Dell Ultrasharp 2007WFP 20" Widescreen LCD
2.94TB Total Storage