Weird Es with accent marks on Mozilla?

Can anyone tell me what I could search for to find something about
this? I did hard spaces using option-space bar on Dreamweaver MX 2004
for Mac and it's fine with Safari but with Mozilla wherever there are
hard spaces I get weird Es with accent marks over them. Very weird. I
looked for "weird characters" and "hard spaces" and stuff butg
couldn't find anything. )

Jackie