It was discovered that when PCManFM was installed standalone, it was unable to decomress archives. This update adds xarchiver as a require at installation.
Uploaded to core/updates_testing
# urpme xarchiver pcmanfm
# urpmi pcmanfm
-> also xarchiver gets installed.
In pcmanfm, double clicking a *.rar brings it up in xarchiver.
Advisory pushed to SVN.
An update for this issue has been pushed to the Mageia Updates repository.