It happening everyday of late, when the new system went live a few months ago it was a problem but it was sorted but over the last few weeks it contuines to happen.
In other news:
DAA seeking up to 150 redundancies at Dublin Airport - RT News
Seems to be because of lack of traffic in T1.
An problems with a US Airways flight to CLT on Tuesday.
Incident: United B752 over Atlantic on May 8th 2012, engine with its own mind