I've been using the 1.83.01 version for a few days now, and it appears a bit sluggish compared to the previous one.
I use LaunchBar Commander exclusively as a set of nested menus that are accessed through icons on the system tray. In this version, a large percentage of clicks on the icons, either in the tray or in the menus that pop up from single-clicking on the tray icons, generate a "List index out of bounds (n)" message box, where n seems to change at random, but is usually less than 10. (See attached screen shot.) However, after the message box pops up, the software usually gives me the menu I want, and I can usually launch programs from the menu.
Anyway, this is a great program, and I don't know how I managed before this. But the above teething problem has me using "Find and Run Robot" a bit more these days!