Signer and Auditor does not agree on a signature

Gilles stumbled over a bug in the Auditor or Signer. This record:

@ 300 IN TXT "Export: Wed Feb 2 15:00:01 CET 2011"

Fails with:

ods-auditor[14869]: RRSet (pol-restena.dummy.local, TXT) failed
verification : Signature failed to cryptographically verify, tag = 8076

It seems the problem comes from the 2 spaces between "Feb" and "2".