I bought an apartment in Dec 06 through DCC Affordable Housing Scheme. Similarly, they told me it had already been snagged by them and that if any problems came to light in the first 6 months they would get it resolved.
I did indeed find a few problems when I moved in and I didnt have much luck in getting the council to do anything about these. I contacted the builder myself and got a couple of things fixed. Still trying to get one problem fixed, which I have been chasing a sub-contractor for, although it looks like it is finally getting done tomorrow.
Just one piece of advice if you find snags - get the full names and contact details of everyone you deal with and note down the dates and times of phonecalls etc in case you need to write any letters at a later date.
Also, give the council a call and ask them what the situation is if you find any faults when you move in as there may be different criteria/conditions on the different developments etc.
Hope that helps.