not working in windows

Why is this site not working properly in windows explorer? 
 
I can log in but when i write a post and then go to send i just get a message saying that i can't send a blank post. Also i can't insert smileys.
 
I am finding that it works fine in google chrome just not explorer. I am also using windows 8 if that is of any help.
 
thank you 
 
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