Converting 7.2 to 2015 -> 'original filter not available' message -> strange borders on table and anchored frames

I just converted my 7.2 files to FM 2015 and got some 'At least one original filter ... graphics imported by reference ... not available ..' messages.

When I looked at these files, I found that many anchored frames had heavy black borders that I could not change and some tables had strange thick cross-hatch borders that I similarly could not find information about.  I'm guessing this is some kind of error condition report but have not been able to find any information about fixing it.

The affected files tend to be older ones originating before FM 7.2

Any ideas about how to approach this?  See pictures.