Seems a few people have been pushing around the idea that 7077 is no different from 7100. Given that 7088 was the build that was jumped to 7100 and not 7077, it means there were still 11 builds worth of changes before a build was finally signed off as the release candidate for Windows 7.
If you’re running Windows 7 build 7077 (leaked earlier), you really do need to install 7100 if you want to give any relevant feedback. 7077 still has a few stability issues which, if reported, would be nothing more than a waste of time while being totally redundant. Granted, the build is stable, but when you’ve got a more stable build available to you, why hold back?
As everyone knows, 7100 already leaked via usenet/torrents, but if you want to give feedback, your best bet would be to just wait until 7100 is released via the usual channels (in this case, MSDN/TechNet on April 30 and worldwide on May 5).
Sorry for singling you out, Ed. You’re awesome, but I had to post this to suppress any confusion which might’ve resulted amongst our readers from your post.

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Windows 7 build 7106 works better than Windows 7 build 7100 RC, despite the fact, build 7106 has been available in the torrent before RC.
Build 7106 is older than build 7100 and may have some of the bugs the 7077 has.
I use 7100 and its very stable and great.