Someone asked me what the impact would be if a VM is installed with the wrong OS type.
My first thought was that this probably would introduce some performance issues, but then it hit me that this would cause the incorrect VMware Tools to get installed in the VM, leading to all sorts of unintended behaviors. [...]

Who is affected:
Customers who are using VMware vSphere ESX 4.0 and are wanting to install update 1, via VMware Update Manager (VUM).
Problem description:
Upgrading ESX 4.0 to 4.0 U1 using VUM fails or times out. Rebooting host results in a PSOD and the host has to be re-installed.
Workaround:
Please disable any 3rd party hardware monitoring agents running [...]

Here’s another new book just out about VMware VMware ESX and ESXi. According to Amazon.com, you’ll not only learn the basics — how to pool resources from hardware servers, computer clusters, networks, and storage, and then distribute them among virtual machines — but also the stumbling blocks you’ll encounter when you monitor systems, troubleshoot problems, [...]

If you happen to search Google for one of the following phrases you might expect Google to return a list of official VMware Knowledgebase articles on the topic.

crash debug screen
machine crash screen
ESX Server PSOD
Purple screen crash report
Decode purple screen error

Guess what? VMware’s own document standards prevent us from using any of these phrases in the [...]

Today VMware announced a new service aimed at the SMB market making it easier for these companies to adopt and move to a virtualized server environment.  This new offering is called "VMware Go™" and although currently in beta is predicted to go live in Q4 2009.
“VMware Go™ is the latest innovation we’ve brought to market [...]