Possible Duplicate:
What content am I being blocked from editing and why?

Was trying to edit the following question to fix the broken URL:

Upon submitting I get the following error:

Oops! Your edit couldn't be submitted because:
* Sorry, posts can't contain that content.
* Sorry, post titles can't contain that content.

I literally just fixed the URL and added tick marks around "C:", and the error message doesn't make it clear what "that" content is.

What happened? / What did I do wrong? / Something broken?



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