Hi mosh,
One solution could be to upgrade your GSA to 6.2. As I understand it,
you can base64 encode your Meta Strings!
Another idea might be to check the XSLT code on the MT output tags. It
could be breaking somewhere along there with the " (not sure thou
- since I've not seen this problem before).
Have you done any customisation to the XSLT? If so, try it on the
default frontend with Meta Tags turned on.
Regards,
Steve.