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The problem is in a race condition.. Validation fireChange should be done in edt.
http://hg.netbeans.org/cnd-main/rev/d3b9c6b9da86
Integrated into 'main-golden', will be available in build *201301250001* on http://bits.netbeans.org/dev/nightly/ (upload may still be in progress) Changeset: http://hg.netbeans.org/main-golden/rev/d3b9c6b9da86 User: Andrew Krasny <akrasny@netbeans.org> Log: Bug #225183 - Possible NPE in automated tests (coming from AuthenticationSettingsPanel) Firing validation event in ETD