Normally, after you have installed your operating system of choice in a VMware virtual machine, you have to install the “VMware Tools” that allow VMware to manage the hardware virtualisation, like interacting with the host system's graphics card. However, there is now an open-source implementation of the VMware Tools (produced by VMware), and it comes with openSUSE 11.0.
Indeed, I thought I had a problem when I couldn't install VMware Tools as I usually would after upgrading my openSUSE virtual machine to from version 10.3 to 11.0. The VMware Tools installer complained that some other package had already installed some of the VMware support files. In the end, the easiest thing is to delete the old VMware tools (if you have it installed from a previous version of openSUSE) and just go with the new “open-vm-tools”. No problems so far.