I've noticed a few issues that are repeatable:
For reference, I use a Mac Pro 8 Core, OSX 10.8.4 (latest version), Logic 9.1.8 (latest version), Analog Lab 1.0.3.
1. Crashing: If the GUI is open while changing the plugin, Logic crashes. If the GUI is open quitting Logic, it crashes on quit. If the GUI is not open, the crashes don't happen.
2. MIDI Controller Knobs: If I assign a knob on my controller (Akai MPK) via MIDI using the plugin's midi setup, all is well. If I use a knob on my controller that hasn't been set up via the plugin, even if it corresponds to a knob on the GUI preset, the CPU suddenly spikes and the audio becomes glitchy.
3. I'm guessing that software updates are coming for the SEM, Jupiter, etc.?
I hope these observations help in tracking down bugs!