IE - ok Firefox - dá pau

Deu pau na hora de inserir o topico

Erro:

IE funciona ok:

/applications/core/interface/imageproxy/imageproxy.php?img=http://www.zinabre.com/news/ie.jpg&key=abdc155cc2b8c700b61519ca4e4719c7c7865fb56f8d2a5dc17a0ada1a2f1dcf" alt="Imagem Postada" />

Firefox

/applications/core/interface/imageproxy/imageproxy.php?img=http://www.zinabre.com/news/firefox.jpg&key=6c7893c0214e0d62e0f8475350697fa91bbf28cebc21260ca0248fca8821c521" alt="Imagem Postada" />

Por favor me ajudem