I was trying to edit this question. I just wanted to add a tag and add a link to CamStudio, but I can't save it. I'm being told

please do not use these words in titles: 'Problem'.

Well, I wish I could. But the software the user is talking about is named "Problem Step Recorder" and, if the word mustn't be used in a title, how did it get there?

Regarding

if the word mustn't be used in a title, how did it get there?

I assume the question was asked before that filter was in place?