Welcome to WebmasterWorld Guest from 220.127.116.11
Use the preview tool to find the url if possible, but failing that right click on the ad with the copy option and paste this to a new window or notepad. Than strip out the &client= stuff after the url and everything before (and including) the adurl= bit. That should leave you with just tha landing page. Have a look at the page then block if necessary.
You could also do a rightclick->"View Source" and copy the link out of the HTML source code.
I'm also using IE7 and can no longer see the domains in the status bar.
try selecting "View" from the drop-down menu and ensuring "Status Bar" is checked.
I can't believe I was so stupid as to download IE7. I think I must have unclicked the status bar in my desperate attempt to get rid of the bar with the tabs.