#18 longer table names doesn't work

When i try to drag and drop a table with a small name, everything works fine. I get the message about the table name being changed (weird but no problem), i hit yes, and everything works. Now with a longer table name, ('jos_estateagent_images' for example), it doesn't work.

If i manually add a type and assign the source table name to 'jos_estateagent_images', and it tries to refresh the info, it gets a NullReferenceException