The software used to run the mertner.com blogs – WordPress – has been upgraded from an arbitrary daily build of v1.3 to the newly released v1.5. Getting the upgrade to work required changes in quite a few places, and chances are that something somewhere does not work quite right as a result of the upgrade.
If you find something of this kind, please send an email or add a comment to this post. (Assuming comment posting works, of course. If not, please yell loudly until we hear you or find the problem ourselves.)