Created Unassigned: Double quote replaced by some other "junk" character [67]

Hi,
I am noticing v8Engine.Execute() fails with :
_
SyntaxError: Unexpected identifier
at Script Document xx..xxx.... -> -----------------------_
exception.

I see that normally one of the Double quotes ( " ) in the javascript text is replaced with some other characters and hence the syntax error. This seems to be intermittent issue as it doesnt happen all the time and not on all the machines the application runs.

Can you please have a look? I am using version 5.3.

thanks
Pandey