As has been concluded on irc://irc.freenode.net/#samba-os2, Samba 3.0.28a will not have fixed "I/O errors on access to SMB shares of OS/2. (LP: #112839)" - the kernel has to be compiled with CONFIG_CIFS_WEAK_PW_HASH enabled by default, otherwise this bug will persist.
As has been concluded on irc://irc. freenode. net/#samba- os2, Samba 3.0.28a will not have fixed "I/O errors on access to SMB shares of OS/2. (LP: #112839)" - the kernel has to be compiled with CONFIG_ CIFS_WEAK_ PW_HASH enabled by default, otherwise this bug will persist.