Ok first off this isn't some critical problem, just a bug report. I'm using ULE 439 (I realize it's outdated but it IS the version that comes in the newbie package) on a v12 (I think. its a 70012) ps2 slim.
When I try to launch ULE from either the main menu or the FMCB logo while the disc cover is open it fails to launch and just sits at a black screen. If I close the lid the main ULE screen shows up but is unresponsive. This only happens with Disc control on however, with it off the problem disappears. Just thought I would give a heads up since I've yet to see anyone else address this problem.
Updated to 4.49 and the problem is still there although once you close the lid it works like normal.