I have previously flown for this operator and the database always showed 2000 and not 2500.
With all due respect... if this has been known to be an issue for a while, why has it not been fixed? Was there no process in place at all whereby the error in the database could be reported and subsequently rectified?
If that is in fact the case, then Tiger have real issues with internal reporting processes and safety management.
Maybe it's not an issue 99% of the time because
SOP dictates that the MCDU be properly checked.
However, on this particular approach, for whatever reason, the holes in the cheese lined up and they did descend lower than cleared and allowed.
EDIT: What ozbiggles said above..... that's what happens when you go to make a cup of coffee half way through a post... someone else beats you to your point!