Found via WinFuture.de (article in German):
Microsoft released another batch of updates for the Windows 8.1. preview. They are:
- Compatibility update for Windows RT 8.1 Preview and Windows 8.1 Preview: June 2013 (KB2863312)
- ListView does not scroll smoothly in Windows 8.1 Preview (KB2868208)
- Single sign-on (SSO) does not work for VPN connections that use certificate authentication in Windows 8.1 Preview (KB2866763)
- Repeatedly offered update for a nonpresent device in Windows 8.1 Preview or Windows RT 8.1 Preview (KB2867624)
- Update improves file search experience on SkyDrive in Windows 8.1 Preview (KB2868581)
Download: via Windows Update.