An issue has been reported in the field regarding delays and slow performance when using the View Client if HTTP 1.1 has not been enabled in Internet Explorer.
This may be seen when:

Connecting to the View Connection Server
Logging in and performing authentication
Connecting to the virtual desktop

The following KB [...]

A new bunch of patches for ESX 3.5 and 3.0.x were posted this week from VMware. If you’re still in the old Virtual Infrastructure 3 world, you might want to look in to the latest patches as they contain security and critical updates.
Patch Download and Installation
See the VMware Update Manager Administration Guide for instructions on [...]

Much along the same lines as my last post, here is another Resolution Path for you all, this time in the Networking area. Download the zipfile and keep it handy for the next time you run into any network related issues in VI.

The main problems are shown in yellow.  The steps to resolve these issues [...]