Glove box mount holes deteriorated.

When glove box is out of the car, use some 5-minute epoxy.
Mix it up and put around the outside of the mount holes, on the back side of the glove box. Let it harden fully before putting the glove box back in car.

It's worthwhile to beef up the ones that haven't cracked yet - that might prevent them from cracking.
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Sven: '89 245 NA, 951 ECU, expanded air dam, forward belly pan reaches oem belly pan, airbox heater upgraded, E-fan, 205/65-15 at 50 psi, IPD sways, no a/c-p/s belt, E-Codes, amber front corner reflectors, aero front face, quad horns, tach, small clock.