Admin portal -> Edit VM -> Custom Properties when I select one and then decide to not use it and click "-" button, it won't disappear. The only way how can I get rid of it is to add another custom field by "+" and remove the former and keep the newly added instead (since it starts correctly with nothing preselected) Tried in 3.1 as of 1.7.2012
fixed upstream (http://gerrit.ovirt.org/gitweb?p=ovirt-engine.git;a=commit;h=467e2c6fd43d827e00f464c8bc87925caa331e1b)
closing ON_QA bugs as oVirt 3.1 was released: http://www.ovirt.org/get-ovirt/