I'm not sure to what Plasma component this is related, but here's my bug : if I right click ANY window title (Dolphih, Fireofx, Libreoffice, anything), the context popup shows up, but it does not disappear when I click somewhere else. The only way to make it disappear it to reduce the window itself. 

I tried disabling the compositor (Kwin), problem still occurs. I tried changing the window theme, problem still occurs. I tried changing the window decoration (from Breeze to "Plastik" for example), problem still occurs. 

Reproducible: Always

Steps to Reproduce:
1. Open a window
2. Right click the titlebar, the context window shows up 
3. Click anywhere else ; the popup does not disappear

Actual Results:  
The context popup does not disappear

Expected Results:  
The context window should disappear after I click anywhere on the desktop. 

Using Intel xf86-video-intel 1:2.99.917+478+gdf72bc5-2 driver with mesa 11.0.3 on Arch Linux.