I´m having problems (reported in the forums) to get 2.9B to run CIFS/FTP properly (i´ve tried several nightlys with no success). Looking in SVN it seems that 2.9C is "in the making" …
I've just tried CIFS and FTP with the todays 2.9 build - both are working fine. Note that the CIFS DLLs have changed - and there are two of them now: Win32Utils.dll and Win32NetBIOS.dll.