I’m also seeing this. To be honest, the whole schema-editing part is very flaky atm. If i have several fields that should have type string/text, and I edit one of them, ALL text-fields is set to string/varchar(0) which also conveniently truncates all my data.
Before touching the Schema-editor I now have to backup the db, do the editing-ritual in the right order, and then restore the data.
Still, all in all I think you guys are making something good and have implemented alot of great ideas 
/Dag