I'm not sure i can go into too much detail,but the specific wording of the violation "reason" was:
COMMENT SPAM: As stated in our program policies etc etc...."
REQUESTED ACTION: Please make all necessary changes in the next 72 hours...
the rest of the email was pretty much a canned response about T+C's violations etc.
They gave me the 72 hours (which actually was more like 5 days) to sort it out which i missed because i didn't get the email initially and then the switched me off. As soon as i was able to contact someone it got switched back on.
And no, there was no message in the adsense account area, i had messages telling me about how to increase revenue and the usual stuff but nothing related to this.