This link solve nothing, using wineboot instead of wineprefixcreate end to the EXACT SAME issue. My conclusion : Wine 1.1.3, 1.1.4 and newer are useless until we can use prefix as we wish like before, I will stay with wine 1.1.2 and report it as the last usable wine version on every forum I know and make it the newest wine version usable with our project, PlayOnLinux. If dev are smart they will quickly revert/fix this nonsence...