Thanks for advice and comments.
FWIW, and in order:
1. I can click with middle button to get a new browser window to open. But, it takes longer to open that way, and it opens a new tab, so that when it is time to close the tab, it takes me through the "Do you want to close this tab, all tabs, or cancel?" window, which is a few too many steps to qualify as a work around. Though it was an interesting test.
2. I tested with Safari and Chrome and both exhibit the same problem as IE.
3. Backspace key on keyboard seems to work the same as the "Back" icon on the IE 8 browser, that is, it just re-displays the same page.
4. Ingersoll444 You are not alone. I guess I use the back icon infrequently except in the MTF threaded discussions, so I haven't noticed it on other sites. I suspect some combination of browser settings and/or pop-up/page hijacking protection might solve this for us.
FWIW, I Googled "googleads.g.doubleclick" (I know, like sending the fox to check the hen house) and found thousands of hits, with hundreds of folks complaining of the same symptoms as I, using all manner of browser including Firefox, Chrome, Safari. . . It seems that Google bought AdSense and implemented the doubleclick technology to track clicks on advertising links on sites that use AdSense. I assume MTF uses AdSense. I also assume that most people have some setting or another that eliminates the browser history corruption that I am experiencing.
I'll keep searching, and in case anyone is interested, here is a screen shot of what my browser history looks like when the hijack has occurred ( I know there are a few personally identifiable items there, I whited out the key ones):