The new release of Support Center is v2.7(20080308) and includes the following of fixes:

• When viewing a ticket message it now shows correctly " and not \";
• Category filter in the ticket manager in backend wasn't doing the refresh automatically;
• Readmail Add-On was removing underscores from the e-mail addresses.

And includes the following new feature:

• It's now possible to add custom fields in the e-mail notification of the ticket creation. To use it you must add the variables %cfield{ID}_caption% and %cfield{ID}_value% for caption and value respectively. The {ID} is the ID of the record in the database.

There's also a problem in the language file english.php, the %url must be replace for %tkt_url% so that the URL for tickets in the e-mail notifications of a new ticket message works correctly.