I don't know if this has been addressed here already. If so, please ignore.
I noticed that all the input elements of the comments form are incorrectly pushed 20px to the right in Internet Explorer. See attached image.
The reason is a rendering bug in IE as explained here:
http://www.positioniseverything.net/explorer/inherited_margin.htmlThere are some solutions for this but the most simple I think is:
put an additional <span> tag around the input and textarea tags in tpl_form.php!
like this:
<p>
<span>
<input id="comments-form-name" type="text" name="name" value="" maxlength="<?php echo $this->getVar('comment-name-maxlength');?>" size="22" tabindex="1" />
<label for="comments-form-name"><?php echo JText::_('FORM_NAME'); ?></label>
</span>
</p>
This solved the problem for me.
I hope this helps.