Widgets.js/timeline issues in ie


Hi everyone.
There are couple of issues with twitter timeline, mostly in ie.
First is when I’m trying to load website, containing embedded timeline, within an iframe, error appears:
“SCRIPT5007: Unable to get value of the property ‘appendChild’: object is null or undefined
widgets.js, line 1 character 2752” (ie8, ie9, haven’t tried ie10+)
even if there’s only a script tag in < head > and no timeline renders.

Second one appears mostly in ie8, but also randomly occures in other browsers. I have no ideas why this happens, but sometimes when I’m trying to render a timeline using createTimeline function, i receive an empty iframe:
< IFRAME style=“BORDER-BOTTOM: medium none; POSITION: absolute; BORDER-LEFT: medium none; WIDTH: 1px; HEIGHT: 0px; VISIBILITY: hidden; BORDER-TOP: medium none; BORDER-RIGHT: medium none” id=twitter-widget-14 class=“twitter-timeline twitter-timeline-rendered” frameBorder=0 allowTransparency scrolling=no allowtransparency=“true” >< / IFRAME >
Will be grateful for any piece of advice)
thanks in advance