When I chat I obviously use Kibitz (bottom left) and that usually works fine.

But when some (not all) opponents talk to me, a wiindow pops up (right over the board, of course) with their message. Why is that?

Samsami

I agree with diane that Javafibs is best, but on the other hand, a chat box popping up in front of you can keep you from perhaps not seeing an important chat (which has happened to my while acting as a Tournament Director).     For other reasons, I do not use 3Dfibs for directing tournaments.   

What I found helpful while using 3Dfibs was to move the box over so that it does not block your board when it pops up, thereby allowing you to see, but ignore, if you want, the chat box that pops up again and again.   

socksey



Until you spread your wings, you'll have no idea how far you can walk. - Lithograph from Despair.com

There is no room to move the box over 

Do you have a teeny tiny monitor?  I don't understand.   

socksey



Madness does not always howl. Sometimes it is the quiet voice at the end of the day saying, "Hey, is there room in your head for one more?" - Lithograph from Despair.com

No not tiny 
But 3dFIBS fills so much of the screen that the chat box covers part of it.

You can move the chat box over so that just the edge of the chat box is on the board.   

socksey



Not everyone gets to be an astronaut when they grow up. - Lithograph from Despair.com

Most windows are resizeable, and the chat window in 3dfibs is one of them.