Using Ubuntu 12.04 LTS, installed LXDE for the heck of it. Used it for a bit, then logged out and logged in. Now the taskbar isn't there, and there's a solid gray bar at the top of the screen (width roughly the same as that of the taskbar). What should I do?
The solid gray bar is your task bar. Right click it and click 'Panel Settings'. You'll have to manually add everything you had on it.
The default LXDE panel file is stored at