Yeah, I had this happen last night, except it removed my key bindings and the macros I had dragged over as well as the macros I had defined.

So I redid them and remembered Lokked's post above, so, I made a side bar and put everything on them and haven't had an issue since.

I may try putting them back on Action bar 7 tonight or hiding my side bar.

I am wondering if "hiding" actually deactivates it instead of just not showing it.