Strange results using vnc

[MR ZenWiz]

I tried to run the "Remote Desktop Viewer" from Menu->Other and an
icon appears in the window list, but it closes before it does
anything.  If I run vinagre fro the command line, I get a couple of
error notices because xinerama and RANDR don't get along, but it runs
just fine.

I copied the menu item to a panel and deleted the "-F %U" from the
command line in the properties and it works just fine.  I edited the
main menu to do the same, and now it also works just fine.

According to the man page, "-F" opens a .vnc file, but clearly if %U
is not defined this is a problem.  I'm curious why the system would
ship with parameters built into the menu command that can cause
problems.

Comments?