I have the following line in my fstab for mounting a samba-share:
//hildi/foo /mnt/hildi/foo  smbfs  guest,codepage=cp850,iocharset=iso8859-15 0 0

If I add the user option so that I can mount the share as a non-root user, the 
charset isn't set anymore ( ? instead of umlauts in filenames ).
I can reproduce this behaviour with smbmount (as a normal user):

smbmount //hildi/foo /mnt/hildi/foo -o guest,codepage=cp850,iocharset=iso8859-15
--> OK

smbmount //hildi/foo /mnt/hildi/foo -o user,guest,codepage=cp850,
iocharset=iso8859-15
--> NOT OK, but user (or users or noauto) are legal keywords in fstab

smbmount //hildi/foo /mnt/hildi/foo -o blahblah,guest,codepage=cp850,
iocharset=iso8859-15
--> NOT OK, but blahblah isn't a legal keyword and smbmount continues without a 
warning

Suggestion for improvement:
- smbmount should filter all legal options from the fstab not needed by smbmnt 
(like user,users,noauto)
- smbmount should warn if there are still some illegal options left