First of all, you hit New Thread instead of Post Reply, honest mistake, it's OK...I've done it myself.
Netscape for X sucks! Explorer is kinda old and Mozilla may not be the royal king eigther, I'm afraid(I like Mozilla though).
I suggest you take eds advice, even if it dosen't solve the problem you might find a better browser.
iCab and Opera for speed, OmniWeb for looks.