I attempted to edit jquery ui tabs problem and got this message box:
(Until now I wasn't aware you could get more than one of these at once. Is this relevant to all sites or just Stack Overflow?)
I've seen each message separately enough times to figure out that it's actually two messages rolled into one:
please do not use these words in titles: 'problem'
a question with that title already exists; please be more specific.
But for the sake of clarity to users who aren't as familiar, shouldn't there be some sort of separator between the messages? Currently it's a run-on sentence, which is at best annoying and at worst unclear.
Alternately, the messages could come one at a time, though I think that has the potential to be frustrating depending on the order in which the messages appear— I think the user would want to know about the "problem" restriction first, lest they reword the title to be unique and yet still contain "problem".