From a customer service request:

System running enterprise kernel with two 1.9 gig swap partitions,
rhn_register quits with the following:

----- [snip]

Traceback (innermost last):
 File "/usr/lib/python1.5/site-packages/libglade.py", line28, in __call__
  ret = apply(self.func, a)
 File "/usr/share/rhn/register/gui.py", line 448, in \
                    onProfilePagePrepare hardware.read_memory()
 File "/usr/share/rhn/register/hardware.py", line 172, in read_memory
  megs = string.atoi(memlist[1])/(1024*1024)
ValueError: atoi() literal too large: 4038557696

----- [snip]

The atoi literal there is the total ram+swap in bytes.  Seems this much ram
pushes it outside atoi's legal range.

Turning off one of the swap partitions solves the problem, but given that
the swap limit on the enterprise kernel is 8x2 gigs (if I remember
correctly!), we might want to look at this.