Hm, to add to that list, it seems the F2 log doesn't update via sendRPGMessage() unless you've opened it at least once.
Recreation:
*Log into your client and find something that uses sendRPGMessage()
*Activate it and open F2 - Nothing new appears
*Close the F2 window and activate the sendRPGMessage() function again and then press F2 again
You will have two (or more depending on how many times you used the function before checking) instances of the message sent to the RPG Window.
I've found resizing it the first time you open it shows the messages
I've found resizing it the first time you open it shows the messages
Pretty much anything that doesn't work right on first open requires a resize to fix it. I.e: Profile quotes, if they're too long they get cut off but a slight 1 pixel resize makes it display properly.