Make sure that you invoke nstcvs commit to verify that all modifications are checked in.

[root@quesadilla nst]# nstcvs commit
cvs commit: Examining .

... lots of CVS "Examining" messages 
    if a editor window asking for a comment appears
    then you still have files that are not checked in ...

cvs commit: Examining wui/include/at
cvs commit: Examining wui/include/make
[root@quesadilla nst]#