We ran into a problem running the web center installation on Solaris 11 yesterday and I need to document this for my own sake.
The installation would fail all prerequisite checks randomly on different environments. We could just click continue and the install would be fine or run with ./runInstaller -ignoreSysPreReqs.
Our sys admin ran a trace and we tracked the problem down to a file being generated a run time using the sysdef -i command. This showed us that IPC Semaphores module is not loaded.
Just running the ipcs -a command before we install fixed the error for us and generated the correct size of file and made everything work - amazing.