Comment 19 for bug 138145

Exactly, it's a rather important bug for 64-bit users... :-/

For those interested, I managed to solve the problem in a hackish way by simply downloading the i386 package from http://packages.ubuntu.com/gutsy/libs/libxcomposite1, opening with archive manager (file-roller, needs to open once, then open again the 'data' archive), and extrat the files to /usr/lib32. Now vmware runs for me. SecondLife as well.