ZC v1.5.8a (vanilla)

Adding an apostrophe to a categories meta description in Admin adds an escape backslash before it

HTML Code:
Simon's category
becomes

HTML Code:
Simon\'s category
after making a subsequent edit to the meta fields it becomes

HTML Code:
Simon\\\'s
and so on.

Using & # 3 9 ; (no spaces) as the apostrophe gives

HTML Code:
Simon& # 3 9 ;s (no spaces)
I wonder if this is a bug as a ZC v1.5.6c install does not exhibit this behaviour.