We tested one of our databases on IWP. We have several databases. The find feature works on 2 of them, but not on the one we want to use! The main screen only shows 2 fields (out of 48 fields). If I switch to another layout using the layout drop-down list on the left, it won't let me type anything in any of the fields -- the cursor won't show.

Worse, somehow while we were testing the find feature, IWP erased the data in the name fields on 2 of our records.

I don't know about your erasure problem but have you checked the layout you can't type anything in to? Are the field behaviors set to allow you to enter those fields in browse mode? What about find mode? Also, have you checked the permissions for the layout to see if your account has read-only access to its content?