As of r4571, Oolite’s ability to display Growl notifications while in full screen is disabled by default. This is because the next major release of Growl, version 1.3 (for Mac OS X 10.7 only) is going to change protocols. The preference for Growl priority level has also been removed.
It is possible to reactivate support at the command line as follows:
defaults write org.aegidian.oolite groolite-disable -bool no
This is expected to silently stop working with Growl 1.3, but shouldn’t cause any actual problems.
It may be practical to re-enable Growl support in a release after 1.76, if there is demand. For Oolite 2.0, I anticipate using a less intrusive form of full-screen mode in which Growl notifications will work as normal, so Groolite will be obsolete.