Ba-ba-ba-bump, ba-bump, ba-bump, ba-ba-ba-bump. (playing my to-the-top bongos)
Actually, I'd be surprised if I'm the only one that this has happened to, and so in the off chance that it might happen to someone else I'll post up some pictures of the differences that I'm talking about.
In the above pic, the stock dashboard-side latch and bracket is on the bottom, and on the top are two of the brackets that I hoped would fit but didn't (they fit the '89 latch sort of ok, but not the dash at all).
In the above pic, the '89 glove box is on the top and the stock 'box is on the bottom. You can see that the stock 'box's latch goes into the dashboard half, whereas on the '89 the dashboard half goes into the glovebox.