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Seems that categories with a space char in name are lost after restart. That's at least what I see in build 20130917 when I try to create category named This Week.
could reproduce
fix: http://hg.netbeans.org/core-main/rev/f7633e25e975
Integrated into 'main-silver', will be available in build *201310150001* on http://bits.netbeans.org/dev/nightly/ (upload may still be in progress) Changeset: http://hg.netbeans.org/main-silver/rev/f7633e25e975 User: Jan Peska <JPESKA@netbeans.org> Log: Issue #236694 - Categories lost after restart Decode category name while loading categories on start