I am guessing you have something like this in your code:
A fixed in place bed is in the bedroom.
If you click the Index tab in the Inform IDE, and then the World tab, it will show you what things you have in your game world. Look for any items with odd names. If you see "fixed in place bed" listed, then your game has a thing with the name "fixed in place bed" instead of what you want, which is a thing called a "bed" which is fixed in place. You probably want to say this:
A bed is in the bedroom. The bed is fixed in place.