Hi,
I tend to use Ctrl-N and Ctrl-P to navigate my open documents. I have noticed since moving to V19 that whilst next-buffer behaves the same as previous versions - sequentially stepping through each buffer (in this case each has its own window).
prev-buffer however only steps back a single step and than toggles back to the buffer where it originated from. In effect wherever I am in the buffer list, previous only steps back once, then forward, then back, then forward - only switching between the current and previous buffer in a cycle.
Not had a chance to repro this on a PC system a yet, and looks like the deeper code for this is within the editor code not the macros.
I am away I can use window/tab commands to achieve similar goals, and all the other prev/next commands I have tried to not exhibit the issue that prev-buffer has.
Cheers,
Mark