I don't really think that this is an ZDC issue, but maybe you have experienced the same issues.

ZDC on F9/F10 & RHEL5

when you open an pdf attachment you can not choose open with, only save as. I already the mimeTypes.rdf in zimbra/zdesktop/profile without any luck.

any idas how I can do this?
Im to stupid to edit the rdf file by hand (should this be human readable???)