I'm writing a Facebook iframe/Facebook Connect application and one of the pages includes a multi-friend-selector. It renders perfectly in every browser I tried (FF/Mac, Safari/Mac, IE8/Win) but does not render at all in IE7/Win. I waited and waited (in case it was just being slow) and it never appeared.
Here's my code.
<fb:serverfbml style="width:750px;height:700px">
<script type="text/fbml">
<fb:fbml>
<fb:request-form
action="<? echo $invite_href; ?>"
method="post"
type="<? echo $app_name; ?>"
content="<? echo htmlentities($content,ENT_COMPAT,'UTF-8'); ?>">
<div class="clearfix" style="padding-right:20px;" height="500" width="750">
<fb:multi-friend-selector
actiontext="Here are your friends who don't have <? echo $app_name; ?> yet. Invite your friends and let them help too - it's free!"
exclude_ids="<? echo $friends; ?>" />
</div>
</fb:request-form>
</fb:fbml>
</script>
</fb:serverfbml>
The other required things (FeatureLoader.js and all that) are (must be) properly included, since the friend selector and every other fb tag I use around the application works perfectly. The serverfbml tag is the ONLY thing giving me trouble in IE7. Most people seem to have a problem with the selector rendering at an annoying 150px tall - I can't seem to find anyone else who has a problem with it not rendering at all.
Facebook is encouraging developers to switch to Requests 2.0. FBML is being deprecated and so reliance on fb:serverFbml will likely by phased out at some point this year. Fortunately there is a MUCH easier way to do this using the JavaScript SDK and it even works on websites.
FB.ui({method:'apprequests',...});
Learn more about using this here: http://af-design.com/blog/2011/02/17/using-facebook-requests-to-promote-a-website/