make check fails for 1.3.0 on SGI at ISOdate(1901,1,1)

I've successfully compiled R 1.3.0 on SGI (info below) but it fails make
check.  From base-Ex.Rout:

## first days of years in the (commonly used) 20th century
seq(ISOdate(1901,1,1), ISOdate(1999,1,1), "years")

Error in if (to <= from) stop("`to' must be later than `from'") :
        missing value where logical needed
Execution halted

Indeed, from the same binary:

ISOdate(1901,1,1)

[1] "NA"

ISOdate(1999,1,1)

[1] "1999-01-01 07:00:00 EST"

Does anyone have any ideas?

--please do not edit the information below--

Version:
 platform = mips-sgi-irix6.5
 arch = mips
 os = irix6.5
 system = mips, irix6.5
 status =
 major = 1
 minor = 3.0
 year = 2001
 month = 06
 day = 22
 language = R

Search Path:
 .GlobalEnv, package:ctest, Autoloads, package:base

R. Woodrow Setzer, Jr.                                            Phone:
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Experimental Toxicology Division                       Fax:  (919) 541-5394
Pharmacokinetics Branch
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