"white holes" - errors in capturing webpages

[Anthony]

I tested v.5 if there were some gains in capturing from the clipboard a selection of web pages.
I did not find something new: there are some pages that hung up UR, as I wrote in a previous post. Now I found a really strange behaviour with this (relative) simple page (it is the same also with v.4.2):
http://mathworld.wolfram.com/ClosedInterval.html

A selection of the definition is copied ok from IE to UR, yet there is a "white hole" frame with no image at some point.
The attachment should clarify. Is there an explanation or a fix? Strange enough, if that image is copied individually it pastes ok. Thanks for any feedback