In reply to Morten Rand-Hendriksen.

Just an example to prove my point:

In place of "Are you sure you want to do this?" the error message could be something like:

"WordPress, the database, and your browser are having a disagreement about who's in charge. You didn't do anything wrong and your data has not been lost. Try again and everything should work."

This is still colloquial, still has an attitude, and explains not only what is happening but ensures the user it is not their fault and nothing has been lost in the process.