Version: 0.19 #3100 (using KDE 3.5.2, compiled sources) Compiler: gcc version 3.4.3 OS: Linux (i686) release 2.6.16 open konversation, don't connect to any server. opan a konsole tab. close the tab by right clicking on the console surface and click "Close Terminal Emulator" (being the last menuitem in the contextmenu) . then go to Window menu item and select "Next Tab" or pres "Ctrl+." your konversation will crash...
Confirmed using konvi 0.19+ #3108 .
Fixed in svn trunk, will be in 0.20. Thanks for your report