Today, we managed to implement a solution that allows RTL Arabic support for OpenERP 5.0.11 reporting engine on our openSuSE 11.1 64 bits server.
It has to do with enabling RTL in ReportLab, which is used by OpenERP to produce PDF reports. Also, OpenERP server code has to be patched to allow it to identify RTL and LTR test direction. OpenERP reporting engine is by default recognizes LTR only.
Support for unicode characters has to be enabled to allow the display of Arab and Hebrew characters.
No more details can be provided as although the solution is open source, we don’t have the permission from the author to publish it.