Details of .iso file of Windows 8 Release Preview build 8400 has been leaked showing the file name, file size and SHA-1 ID. The images of files also show some changes like new icon for Setup (.exe) file and the build is also called the Release Candidate which is its technical name.
(http://i46.tinypic.com/25s2xs3.jpg)
The images and details leaked by Caouna in WinUnleaked forum shows the Windows 8 Release Preview build 8400 .iso image details. The .iso image is x86 version of Windows 8 Release Preview.
The details are as follow:
File name: 8400.0.WINMAIN_WIN8RC.120518-1423_X86FRE_CLIENT_EN-US-HRC_CCSA_X86FRE_EN-US_DV5.ISO
Size: 2.43GB
CRC32: 70B0ACEA
MD5: 7285DA50A07E33BC3B5A20E48AFAF375
SHA-1: 8BED436F0959E7120A44BF7C29FF0AA962BDEFC9
The download for Release Preview build 8400 is now open for connect partners of Microsoft but, it would be opened for public on June 1st which is reported to be the launch date of Windows 8 Release Preview.
On the other hand we have already seen some images of Windows 8 Release Preview both in English and Chinese and Adobe Flash is also pre-installed in Windows 8 Release Preview.