nsIHTMLEditor and virtual keyboard interaction

Hi all,

I'm working in an app that interacts with nsIHTMLEditor's using a virtual
keyboard. I'm able to write inside the editors, however, I can't write
spaces (" "). All the spaces are striped when the next character is typed. I
think it occurs because for each typed character I do a
insertHTML("theStringRepresentingTheCharacter"). So, when I type a space I
do something like insertHTML(" ").

Another issue is related to the properties like bold and italic. I can
change it selecting the text but the new characters typed aren't set
according to the previous ones. I mean, if there is a bold text written, the
characters typed just after this text don't get the correct properties (they
are shown without the bold property set).

Can you help me?

-- 
André Pedralho