I don't know if you are like me for making custom menus,buttons etc. Sometimes a simple typo can cause havoc.
For example,the _mtext (with an underscore) command in a menu will bring up the editor box after the first two prompts of "specify corner" and "specify opposite corner".
However, if you typed -mtext ( with a hyphen)all the prompts will only appear on the command line with no editor box.
A shot in the dark maybe,but it's all I can think of first hand. Hopefully it's something that simple.