With IE8 coming in the not so distant future, Microsoft describes what's new for developers in this Readiness page.

http://www.microsoft.com/windows/products/winfamily/ie/ie8/readiness/DevelopersNew.htm

Google toolbar crashes IE 8 when the user goes to certain web sites. It crashed for me when I visited http://my.ebay.ca  and  http://www.google.com/ig

Way to reproduce:

• Install Google tool bar, in my case toolbar was installed when I upgraded.
• go to http://www.google.com/ig Google toolbar gives you a crashed warning and takes IE with it.

Severity can be high if you had already set http://www.google.com/ig as your home page because you are stuck in an endless loop that can only be fixed if you uninstall the toolbar. Note that the crash doesn't occur if you are in Emulate IE7 mode.

There are reports that Vista getting into a reboot loop after running the Windows Update.

After installing updates from Windows Update, you may get into a Reboot loop where you machines gets to “configuring updates 3 of 3. 0% complete” then reboots. The machine then continues to reboot.

Solution

1a. Boot to the Windows DVD and choose the repair option in the lower left hand corner, choose System Restore, and select a Restore Point predating the attempted installation of the updates.

1b. If you don't have the DVD and the Vista came preinstalled on the machine, boot to the Safe Mode options using F8 during startup (tutorial: http://www.bleepingcomputer.com/tutorials/tutorial61.html#vista).

Once in Safe Mode, invoke System Restore as follows:

Start | Run | (type in) rstrui.exe | [OK]

Select an available Restore Point predating the attempted installation of the updates.

To avoid running into the same problem again, install the following update separately and ASAP:

A software update is available for the Windows Vista installation software feature:

http://support.microsoft.com/kb/937287

Download links for manual installation:

Vista x86 :  http://www.microsoft.com/downloads/details.aspx?FamilyID=5639710d-dfbf-4527-806e-9a1634d0cc8e

Vista x64:  http://www.microsoft.com/downloads/details.aspx?FamilyID=54235949-b5db-4fe2-a841-ef938217b285