If you have a Kindle Fire and are having trouble replying to threads, I found a simple solution (or it should be simple
). Profile Look and Layout
<---Go there and change the quick reply settings. Under Choose Quick Reply Type, select WYSIWYG smilies only. Make sure you hit the Change Profile button on the bottom right.
Viola, you can now post from your Kindle Fire
Edited to add that this is for Quick Replies only, still trying to figure full replies and post edits