[robflynn]

Ie9 allows you to switch the display mode between IE7, IE8, IE9. However, it does not allow IE6.

Also, I'm not yet certain how accurate the older modes are. I did write some code with a known IE7 bug that worked fine in 8 & 9... and which I switched IE9 to IE7 mode the bug occurred as I had expected it to. (Press F12 in IE9 to see the option to select display mode). Apologies if this sounds kind of rambly, as I just woke up...

Downloading these either way so that I can do some additional testing.

[danheberden]

For the most part the compatibility modes work, but there are inconsistencies - such as bugs that appear in IE7, but not in IE8 in compatibility mode. Its a headache, and one that's somewhat remedied by just using the actual browsers.

[saurik]

Does Microsoft Expression Web SuperPreview (Microsoft's official tool for this purpose, which comes with the various rendering engines plugged into a meta-browser) have these same deficiencies?

[robflynn]

Thanks for the info. That's what I was hoping to find out by having these. They now live happily within my suite of various development/testing tools.