I had no idea what this was but thanks to you I have learnt a little more...
And to answer your question, no I didn't change the serial. One of the few things I don't host myself is DNS and the company that has the DNS servers do the serial numbers themselves. I can change other stuff in the SOA record but not serial. They do keep serials though since nslookup -type=soa returns a long serial number and since my DNS works after updating, I conclude that the numbers in the serial must be in increasing order, although the company doesn't follow the recommended standard (YYYYMMDDnn).
I send a mail and asked them out of curiosity... doubt I'll get an answer though.. It's not really the everyday question for
them I guess...
Im still VERY CURIOUS though as to why unresolvable addresses, when trying to resolve them from my server's ip, always resolved to myself when using wildcard DNS (*.server.com). I'd REALLY like someone to explain that to me... (and it wasn't just the server itself, all the computers behind the router, both Linux and Windows resolved things in this way)...