So if you have a bunch of queued items in your VMware vSphere Client Recent Tasks that say “Check new notifications” initiated by “VMware vCenter Update Manager Check Notification“, there is an easy fix. Here’s what it looks like:
To fix, all you have to do is restart the VMware vCenter Update Manager Service on your VCS server. See below:
You can also do a “net stop vmware-ufad-vci” then a “net start vmware-ufad-vci” as well. Let me know if this works out for you! 
If you get the following error when you try and clone a VM in vSphere 4:
Then you must be checking the “Edit virtual hardware (Experimental)” box when you are cloning… DON’T DO THAT! Leave it unchecked and you won’t have any problems…
Let me know if that works for you
Using VMware Infrastructure Client to manage your VMs? Try mounting a valid CD image and get the following error?
Please specify a valid image file... IT IS VALID DAMNIT!
Here’s what my file looked like:
SW_CD_Windows_XP_Professional_32BIT_English_ISO_MLF_X15-05160.ISO
If you rename your ISO file’s extention to all lowercase, VIClient will now accept it, even with the long filename.
SW_CD_Windows_XP_Professional_32BIT_English_ISO_MLF_X15-05160.iso
There is a bug with the VIClient where it requires the file extention “iso” which is case sensitive.
