Plug-In Version: 0.3.2.026
WP Version: 3.5.1
What I did:
1. Started new app = good
2. Added new interface [using new table] = good
(default record id, User ID [auto-increment], sitename [text], type [drop down select])
3. Save = good
4. View Interface -> Add Entry -> [fill in form] -> Save = No result.
What I found:
The table is there.
If I use phpAdmin to insert a record, it shows in the refreshed View Interface screen.
If I use the Add Entry button again, the Form opens populated from the failed Save. (Caching?)
Other stuff that might matter:
I set up a custom theme before I installed & activated the plug-in.