Hot glued to the drive, yes. Glued in any way to the mainboard, no. Mine has been flawless (60gb), but a friends 10gb shipped with the motherboard connector off, and another just got his back from an odd problem, and it also had the motherboard cable come off.

In the entire time of owning my Mark 2 20gb, the cable never came loose. Something must be looser on the MK2a connectors.