Hi,

a Debian user reported the following:

===============================================================================
This bug appears in the UML Class properties dialog, under the
Attributes tab.  If you add an attribute and set its visibility to
"Private", and then add a second attribute, the visibility box shows
"Public" again, but when you click on it, the "Private" option is still
set as selected in the popup.

The same problem can be observed in the select boxes on the Operations
tab, so it looks as though it might be a general problem with Dia's
handling of this type of field.
===============================================================================

I can reproduce it here. Just ask if you need more info.

See also bugs.debian.org/438324

Thanks,

bye,
  Roland