datagrid form not scrolling

[Matt Maier]

I've got one datagrid (form) that never scrolled like it should have, and
another that always did, but suddenly stopped. There's a picture of the
shenanigans here
http://forums.livecode.com/viewtopic.php?f=7&t=22132&p=114336#p114336

It's like the rows and content I'm filling it with are being put into a
layer on top of the default drawing of an empty datagrid. So the content is
there, but the border and scrollbar are attached to something else that
didn't get any content. Is this a problem with the nested groups that a
datagrid is made out of?