found this in ide's log:

Category org.jlboss.tools.deltacloud.ui not found for view org.jboss.tools.deltacloud.ui.views.CloudView. This view added to 'Other' category.

run grep to find where the problem can be:

jlukas@jlukas-laptop:/space/svn/tools/deltacloud$ grep -R jlboss *
plugins/org.jboss.tools.deltacloud.ui/plugin.xml: category="org.jlboss.tools.deltacloud.ui"