Ah, nevermind that last one - the process is started as the last user I logged in as (I forgot I'd used that computer to login to the CIFS share already).
But the main problem is still there: my share is called "example", which is basically just: srvfs example /usr where /usr contains: /usr/akumar /usr/bootes and when I access \\192.168.2.141\example\akumar, I can't do anything in the directory except move around and read files - trying to create a file or directory, or trying to move files around, etc., yields a "Network access denied" error. However, I can do all of that stuff in \\192.168.2.141\example\bootes - why is that? This is all despite the fact that I see the aquarela process being started by the user that I logged in as (akumar). I tried running with -d allcmds to get clues, but I can't really figure this out... ideas?