Revision numbers

[Szabó Tamás]

Hi!

Just from curiosity...

I wondering when will a revision number of form n.m change to the form
n+1.1  ?

If I'm not using 

cvs co -r n+1.1 

is there another case in which CVS will change a revision number from
n.m to n+1.1 ?

I guess it must be at least one case when m reaches the maximum
number of datatype on which is stored.(32 bits?)
But is there another possibility too?

Thanks in advance,
Tamas