Here's one example. You have width=615 and height=17
615 what? pixels? percentage?
I didnt look through the rest of your code to see if there were more. Again, this may not solve your issue, but it would definately cause issues as browsers have to guess at what unit of measurement you mean. Some might get it right, some might not.
<div class="fl_right"><iframe src="http://free.timeanddate.com/clock/i23xoti5/fs13/fcfff/tct/pct/ahr/tt0/td2/ts1/tb2" frameborder="0" halign="right" width="615" height="17"></iframe></div>
While er're at it, I think the halign attribute is deprecated, so you may want to change that to align.