I have a somewhat sporadic error related to editing web part title on a blog site using SP2010.
Steps to reproduce:
It seems that putting just the closing parentheses to the front of the web part title duplicates the issue as well.
Any comments are highly appreciated.
I can reproduce your issue in my local server, it seems to be a known issue, and it has been submitted internal, there will be proficient to further look at it.
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