I always like it when somebody has a new and unusual problem (especially when it is a DNSSEC-related one).
- RRSIG roosendaal.nl/TXT alg 7, id 41090: The cryptographic signature of the RRSIG RR does not properly validate.
I'm not sure what was up with that, but you might want to talk with the TransIP folks running your domain's authoritative name servers so that they can figure out what went wrong and how to make sure it doesn't happen again.