Author: Blue Horizon
This build was compiled exactly one day before the official Beta 1 release (build 1525, specifically the recompile from June 24th). It can be confusing as to why this build has a higher number then the one compiled the very next day, though it could possibly be they had a couple branches of development going on at the same time - both branches being for internal and public testing.
One noticeable thing on the desktop is that the My Documents folder is gone, confirming they planned ahead of time to remove it prior to the Beta 1 build. The folder was brought back in build 1532 a couple days later.
It seems for this specific build, Memphis HelpDesk isn't present in the start menu.
The DeskBar is still present like in build 1525. It still serves barely any functionality other than to see what list of toolbars on the desktop are open.
Likewise, the Family Logon dialog remains fairly basic looking.
The release notes from build 1532 are present here as well - making mention of build 1525.2.
IE and its siblings have been given a slight decibel point update.
I don't think I've shown a screenshot of the old TV Viewer in 1024x768, so here it is in full view.