I see this error when I try to suspend an Ubuntu 10 guest in Fusion:
The request to Suspend this virtual machine failed because the corresponding VMware Tools script did not run successfully.
If you have configured a custom suspend script in this virtual machine, make sure that it contains no errors. Attempting the operation again will ignore the script failure. You can also submit a support request to report this issue.
As the dialog states, the second time you try to suspend the VM it ignores the non-zero return code of the script and it seems to work. But it's annoying.
The problem appears to not be VMware actually, but Ubuntu (or Ubuntu's service
script). I tried to figure out where exactly Ubuntu's initctl configuration/scripts is broken to no avail but found a work-around that I'm happy with.