Thanks for the suggestion David. My sessionInfo() is below:

New computer/32bit R:

R version 2.15.1 (2012-06-22)
Platform: i386-pc-mingw32/i386 (32-bit)

locale:
[1] LC_COLLATE=English_South Africa.1252  LC_CTYPE=English_South
Africa.1252
[3] LC_MONETARY=English_South Africa.1252 LC_NUMERIC=C

[5] LC_TIME=English_South Africa.1252

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

other attached packages:
[1] lme4_0.999999-0 Matrix_1.0-6    lattice_0.20-6  car_2.0-13
[5] nnet_7.3-1      MASS_7.3-18

loaded via a namespace (and not attached):
[1] grid_2.15.1   nlme_3.1-104  stats4_2.15.1

Old computer/32bit R:

R version 2.13.1 (2011-07-08)
Platform: i386-pc-mingw32/i386 (32-bit)

locale:
[1] LC_COLLATE=English_South Africa.1252  LC_CTYPE=English_South
Africa.1252
[3] LC_MONETARY=English_South Africa.1252 LC_NUMERIC=C

[5] LC_TIME=English_South Africa.1252

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

other attached packages:
[1] lme4_0.999375-42   Matrix_0.9996875-3 lattice_0.19-30    car_2.0-11

[5] survival_2.36-9    nnet_7.3-1         MASS_7.3-13

loaded via a namespace (and not attached):
[1] grid_2.13.1   nlme_3.1-101  stats4_2.13.1 tools_2.13.1


Hope that this helps!

Luke Duncan

*Lecturer & Post-doctoral** Fellow*
*School of Animal, Plant and Environmental Sciences*
*University of the Witwatersrand*
*Johannesburg, South Africa*
**
*+27 72 312 0330*
*+27 11 717 6452*



On Tue, Sep 25, 2012 at 11:21 PM, David Duffy <David.Duffy@qimr.edu.au>wrote:

> You need to provide boring details like "sessionInfo()" on old and new
> machines, so we can see which versions of the packages you actually have
> installed, and whether your locale is weird...
>
>

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