What I'm seeing is an error in Developer (caution triangle ! in the lower left) that says that the sort couldn't happen because there were unsaved edits to one of the records. And I'm relying on the sort for a particular method. In 3.5.8 this didn't happen?
But this is less important than the post in viewtopic.php?f=8&t=12277#p62093. Can you help with that? I'm chasing these TEMP_ tables that Servoy can't drop for three days now...