Unable to commit CVS files with tramp 2.0.47

[Vincent Bernat]

Hello !

I was using  Tramp 2.0.28 and was  able to commit files to  CVS from a
remote  machine  (by  opening  the  file, modifying  it,  then  C-x  v
v). However, this does not work any more with Tramp 2.0.47. I get this
message :

tramp-file-name-for-operation: unknown file I/O primitive: shell-command

Any idea ?
-- 
panic("huh?\n");
        2.2.16 /usr/src/linux/arch/i386/kernel/smp.c