Why does it say "database error" when I try to open a profile page?

Yes it's happening to me as well.

It's most likely a fast maintenance which will be resolved soon.

Ah.
Why didn't the admins tell it in a thread then?

It happens to me, I keee refreshing, and one of the refreshes worked, but the next one brought out the error again, so I'm going to assume that it's having some problems, but it should be fixed soon.

Hmm. Maybe it is just a lag...

They won't tell us about every single little error that occurs. If it's serious enough to be mentioned, they will do so, if not, they won't.

This is a server-side issue and you're just going to have to wait it out.

Yes, it's definitely server maintenance or something along those lines.
Looks like we'll have to wait! Oh joy ;)

No, it's not.

Yes, there's a database issue. Yes, we're aware of it. Yes, it'll be sorted out. No, speculation doesn't help.