Startup Notification?

[Walter Hurry]

I'm running FreeBSD 9.1RC3 with LXDE and OpenBox.

The startup-notification port is installed (it's required by a number of 
other ports anyway), but I don't actually see any form of visual 
notification when opening GUI applications. For many of these (e.g. 
lxterminal, pcmanfm) this doesn't matter, since they appear virtually 
instantaneously, but for others (like firefox) the lack is something of a 
nuisance.

Am I missing an optional port, or is there a configuration file somewhere 
which I need to edit?