I'm afraid this is again about JSF issue. What JSF version snipped with your server? It should not be 1.2._08 (07 or 09beta should be used)
Thank you ilya_shaikovsky. Yes, I'm using mojarra-1.2_08-b06-FCS JSF implementation. I'll try new 09 version.
OK, it works with mojarra-1.2_09-b01-BETA1
From my experience, do not use any JSF RI version between 1.2.05 and 1.2.08 included.
1.2.05, 06, 07 have request param handling issues.
1.2.08 has a nasty buffer issue (nr.717)
1.2.09 beta1 proved to be the best tested by us.