Gajim can not open url from vcard... Gajim past mailto to url button.
Gajim past mailto:'hompage' to hompage section in vcard dialog.
vcard.py:
if entry_name in ('URL_label', 'EMAIL_WORK_USERID_label', 'EMAIL_HOME_USERID_label'): widget.set_uri('mailto:' + value)
I think URL_label must not contain 'mailto:'
Gajim version 1.0