Underfull [...] while \output is active

[Matthias Diener]

from BUGS file:

Mensagem ``Underfull [...] while \output is active''
- Registro: 2003/03/08 avila
- Status: PENDENTE
- Desc: a msg aparece várias vezes enquanto o documento está sendo
  processado; aparentemente tem algo a ver com os floating bodies

[Matthias Diener]

can be fixed with something like this probably:

http://tex.stackexchange.com/questions/62296/how-to-suppress-underfull-vbox-badness-10000-while-output-is-active