On Wed, 15 Jun 2016, Paul A. Rubin wrote:
Cosmetics will indeed be different. Jurgen refactored the Beamer class massively in this version, and it may have been refactored once between when you wrote your three-year-old original file and this version. There's a conversion involved in getting your old presentation into LyX 2.2.0, not just cosmetic changes in the display, so it's possible you are correct that a version change is involved. That said, though, I've hit no speed bumps updating any of my presentations ... so far ...
Paul, I assumed that much more than appearances changed since that original file was created.
Since this issue may crop up again for you with some future update of an old file, you might want to take a moment (when you have one) to trim down to a minimal example and post it. Ideally, it would be best to cut down the file (and obfuscate the proprietary stuff) in an earlier version of LyX, so we can verify that the conversion issue is general and not specific to your setup. That requires having access to an older version though, so it might be too much work.
I keep only the current version. And, this is likely to be the only old presentation to be modified in the current LyX version. Other presentations will be brand new so I anticipate no hassles with those. However, I can provide the entire .lyx file for a beamer presentation from 2006 (lyx-1.4.2 and 23K in size) if anyone wants to check for conversion issues. Nothing proprietary in that; it was a continuing legal education talk I gave to the Environmental and Natural Resources Section of the OBA. Many thanks, Rich
