sessionInfo() results:
R version 2.12.0 (2010-10-15) 
i386-pc-mingw32 

locale:
[1] LC_COLLATE=English_United States.1252 
[2] LC_CTYPE=English_United States.1252   
[3] LC_MONETARY=English_United States.1252
[4] LC_NUMERIC=C                          
[5] LC_TIME=English_United States.1252    

attached base packages:
[1] grDevices datasets  splines   graphics  stats     tcltk     utils    
[8] methods   base     

other attached packages:
[1] mvtnorm_0.9-92  contrast_0.13   Design_2.3-0    svSocket_0.9-50
[5] TinnR_1.0.3     R2HTML_2.2      Hmisc_3.8-3     survival_2.36-1

loaded via a namespace (and not attached):
[1] cluster_1.12.3  grid_2.11.1     lattice_0.19-13 svMisc_0.9-60  
[5] tools_2.11.1

System summary:
OS Name	Microsoft Windows XP Professional
Version	5.1.2600 Service Pack 3 Build 2600
OS Manufacturer	Microsoft Corporation
System Name	LOR-LA200807011
System Manufacturer	LENOVO
System Model	64635BU
System Type	X86-based PC
Processor	x86 Family 6 Model 15 Stepping 11 GenuineIntel ~1994 Mhz
BIOS Version/Date	LENOVO 7LETB7WW (2.17 ), 4/25/2008
SMBIOS Version	2.4
Windows Directory	C:\WINDOWS
System Directory	C:\WINDOWS\system32
Boot Device	\Device\HarddiskVolume1
Locale	United States
Hardware Abstraction Layer	Version = "5.1.2600.5512 (xpsp.080413-2111)"
User Name	Adam_Carr
Time Zone	Eastern Standard Time
Total Physical Memory	4,096.00 MB
Available Physical Memory	1.99 GB
Total Virtual Memory	2.00 GB
Available Virtual Memory	1.96 GB
Page File Space	8.69 GB
Page File	C:\pagefile.sys