There are no springs beneath the keys--just keypads. However, the way the keys are hinged and lubricated, there could have been some minor imperfection in the alignment that should quickly disappear with normal use. I don't believe there is anything to worry about.
When not in use, I highly recommend keeping the board stored in a gig bag, or at the very least covered with a plastic cover to keep dust out. Store it in a warm, dry location and it should provide you with years of great service.
Gary
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Travlin' Easy
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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!
K+E=W (Knowledge Plus Experience = Wisdom.)