Hi Riley...
These "new style" panels are not really so new. This is the standard error reporting mechanism you get with XML and SGML content (it's been around for years). These "panels" are really just FrameMaker docs, and by default they are in a locked or view-only state. To copy the text, just "unlock" the file with an Esc,F,l,k (that's an Esc, Shift-f, plain-l, plain-k). You can also do all of the normal things that you do with a FM file (after unlocking it), such as save to TXT or other formats.
Cheers!
...scott