
I can see as well that "Error 28 from storage engine" on top and it is obviously related to the categories.
Google told me that this is a common problem that I shouldn't be responsible of, but something that messed up on the hosting end.
From what I understand the error 28 is a problem of "out of disk space" on the /tmp directory, so MySQL cannot perform some actions. It's unlikely that this is my fault, as I'm currently using 0.4% of the total disk space that I should have available.
So what I can do is just tell Dreamhost of the problem and hope they figure it out.
EDIT: Problem solved in less than an hour (from what I can see from the logs). Not that there's much to see :)

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