re: correct
You're right, Steve: the bottom bar of the Compact frame has never appeared in Firefox. Correction... when first loading a board, the bar appears for just long enough to see it, then the lower edge of the TOC overwrites it. Consistent through every release of FF since 0.8, when I first began using it.
On the very rare occasions when I want to revisit a thread that's gone off Page 1, I switch to Standard mode.
To refresh a TOC while in Compact, I use the pulldown menu to go back to the "Nexus Home", then back to the Board of interest.