Cmd-B opens script editor

[Jonathan Cooper]

A few months ago, I installed GLX2. Not long after this I noticed that
pressing command-B (to make text bold) caused the Script Editor to
open a script (not always the same one). After trying unsuccessfully
to track down the cause, I decided to uninstall GLX2. But the
behaviour persists, so maybe it's NOT caused by GLX2 after all.
Has this happened to anyone else?