To give a little bit of history: a big item for our OpenLP 1.9.6 (Beta 2) release was to fix the JPEG support on Snow Leopard (OS X 10.6), not just on Leopard (OS X 10.5) - see this ticket. But it turns out that was not that easy to fix, as during packaging OpenLP it somehow get left out. For packaging we are using PyInstaller which does support packaging for OS X, but in this particular case the libraries were not being packaged correctly. Because of this bug in PyInstaller, fixing this issue was delayed until after the official release date of Beta 2.
At our Bible college, we decided to switch to OpenLP because it was free. We found it to be feature-rich and easy to use. It's also constantly improving. Kudos to the OpenLP team for such an awesome open source project!