Any user, any theme.
I am seeing a 5 character limit for To/CC under Zimbra webmail. I am seeing this on any user, using any theme. When you type in an email address (or anything) into TO/CC boxes, the box starts to scroll after 5 characters.
See attached screenshot.
In the to box, I tried to enter "user@do" (firstname.lastname@example.org) but the box starts to scroll at the "d". For CC, same sort of thing.
Screen Shot 2012-07-21 at 9.52.13 AM.png