I did some additional testing with UTF-8 characters over the weekend and everything is working as expected.  With no known issues outstanding I have released v0.64 this morning.  You can find the update on your Dashboard or download it from the WordPress Plugin Repository.

1. Fixed a number of strings which were missing translation wrapper functions.
2. Reverted to manually constructed body parameter for wp_remote_post() to allow checkboxes to be properly passed to Google.
3. Fixed warnings generated by calls to static functions which were not declared static.
4. Added check for HTTP API cURL transport and issue a warning when not present. There was a change between WordPress 3.6.1 and 3.7 to the WordPress HTTP API and the streams and fsockopen transports are unable to post form values back to Google using wp_remote_post().
5. Added a setting to allow hiding the cURL transport missing message on the Dashboard.
6. Added a check to ensure jQuery script isn’t output more than once.
7. Remove hook into “the_content” to reduce potential conflicts with other plugins (e.g. WordPress SEO plugin by Yoast).
8. Added placeholders for some of the form fields when defining a Form within the UI.