[BioC] Help strange GSEA error

[Chris Fenton]

> source('basicGSEA.R')
'envir' chosen:<environment: R_GlobalEnv>
encoding = "native.enc" chosen
Error: '\%' is an unrecognized escape in character string starting "Tag
\%"

> sessionInfo()
R version 2.11.0 (2010-04-22)
i386-pc-mingw32

locale:
[1] LC_COLLATE=Norwegian (Bokmål)_Norway.1252  LC_CTYPE=Norwegian
(Bokmål)_Norway.1252    LC_MONETARY=Norwegian (Bokmål)_Norway.1252
LC_NUMERIC=C                             
[5] LC_TIME=Norwegian (Bokmål)_Norway.1252   

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

other attached packages:
[1] limma_3.4.1


Strange never had a problem with GSEA.1.0.R before. 
Typical though, right before an R introductory course in microarray
analysis it crashes. Works fine on my ubuntu machine, I guess it is the
Windows XP machines in the PC lab that are mixing things up. Anyone come
across this error ? 


Chris