Did you had any answer about your problem, i see the same behaviour on one of my CIFS Filer, the counter "other Ops" is somtime 2 times the value of "read ops", the tendancy of both counter are the same (when one's up the other up) but always a greater scale for "other ops".
We introduce few month earlier Windows Seven computers, with (for the moment) indexing option activate on shared map drives => i alert my Windows administrators to disable this as soon as possible. We had this few days a global increase of CIFS operations on this CIFS Filer.
One thing I have been able to demonstrate in a lab environment is the impact on "cifs other ops" by VMware server/workstation when the vmdk lives on a CIFS share mapped by the system running the VMware application.
On an idle filer, installing a Ubuntu VM via a cifs connection peaked the filer to 78 "cifs other" operations per second. After the install, running the Update Manager and updating the Ubuntu install peaked the "cifs other" operations per second to 104. While "cifs other" was showing large amounts of activity, CIFS read/write ops, wasn't. At least not to any noticeable level.
So if you have an environment where user "My Documents" folders are re-directed to your storage, and VMware server/workstation is configured to place it's vmdk's in the My Documents folder, well, then you have a situation where your storage could be impacted in the "cifs other" arena.