Thunderbird Lightning right click broken

[Jonathan Ryshpan]

When I right click on a date (not an event) in Lightning, many of the
options are greyed out (and don't work).  Exactly:
        New Event: Grey/inactive (NOT Normal), Double click works properly
        New Task: Grey/inactive (NOT Normal)
        Previous Week: Black/active
        Next Week: Black/active
        Cut:  Grey/inactive (Normal)
        Copy: Grey/inactive (Normal)
        Paste: Grey/inactive, Even after copying an event  (NOT normal)
Copy appears to work properly; an event copied shows up in KDE's Klipper
tool.
 
I am running Fedora-19 with all updates installed using the KDE desktop
on 8x6_64 hardware.  In particular:
        KDE 4.11.1
	thunderbird-17.0.9-1.fc19.x86_64
	thunderbird-lightning-1.9.1-2.fc19.x86_64

Has anyone else seen this?  Any ideas for a cure?

Thanks - jon