In the Postfix RPM *many* files are installed at the wrong place. The most obvious problems are that log files and spool/queue directories are installed somewhere in /usr/share (!). Maybe I'll redo the whole RPM soon myself and adapt it to decent standards.
Either your system has a number of odd symlinks or you installed a package that isn't ours. The only things our postfix package places in /usr/share are man pages and documentation.
You're right... I can't see why I posted this bug report. Maybe I was confused with MailMan, but even for MailMan the paths have been made better in 7.1 (in 7.0 spool dirs etc. of MailMan were indeed in /usr/share). Seems to be a black hole in my memory :-).