I've got some really weird glitch all of a sudden. I'm in the middle of playing and suddenly I realize that the little tab that minimizes the HERO toolbar on the bottom of the screen is gone.
Note that the little pulldown you see belongs to the Cheat menu mod. I've always used these two mods in conjunction with one another and have never had a problem. The worst thing I'm doing here is with the world map open, holding in the right mouse button and dragging it around to reveal portions of the map. Nothing else is out of the ordinary.
Additionally, both the Misc Options and the Extensions button (The two buttons on the right; the wrench and cell phone.) don't do anything when clicked. Everything else there works fine.
EDIT: When I restarted the entire program, (Terraria tModLoader.) the pulldown tab was back, but clicking just once on the Misc Options (wrench) button removed it instantly and persisted in doing absolutely nothing.
Completely uninstalling the mod and removing all of its config files, then reinstalling it results in the same circumstances. I guess clicking those two right-most buttons is off limits for now.