Resolution: No Longer Reproducible
Affects Version/s: 6.0.6 GA, 6.1.0 CE RC1
Fix Version/s: 6.2.0 CE M4
Environment:Installation without 7Cogs hooks, themes and data. Just using oob portlets and Test user. I've set up with mySQL as backend, but suspect that database is irrelevant.
When using several portlets, and standard portlet chrome, if you make use of 'minimise.maximise.restore' to change the portlet state, you can fall into exclusive state 'unexpectedly'. I've managed to get a process that repeats this.
Log in as Test
Use Classic theme
On Welcome Page, add the Tools - Network Utilities portlet beneath Sign-in portlet
Minimise Network Utilities portlet.
Click on the 'Test Test' url in the Sign-in portlet to go to the control panel
Click on Back to Liferay.com to return to Welcome Page
Restore Network Utilities portlet (MouseOver the Whois tab and you'll see that the URL now includes &p_p_state=exclusive)
Click on Whois tab