[Rcpp-devel] package build error on r-forge linking to RcppArmadillo

Hello,

My rugarch package on r-forge which links to Rcpp/RcppArmadillo has in 
the last 2 check cycles failed with the following errors:

Thu Dec  6 00:15:29 2012: Building tarball for package rugarch (SVN 
revision 502)
using R version 2.15.2 Patched (2012-12-04 r61215) ...

installing to /tmp/RtmppcKcfx/Rinst3a3130428148/rugarch/libs
** R
** data
** inst
** preparing package for lazy loading
Error in dyn.load(file, DLLpath = DLLpath, ...) :
   unable to load shared object 
?/home/rforge/lib/R/2.15/RcppArmadillo/libs/RcppArmadillo.so?:
   /home/rforge/lib/R/2.15/RcppArmadillo/libs/RcppArmadillo.so: 
undefined symbol: _ZN4Rcpp8internal14r_vector_startILi14EdEEPT0_P7SEXPREC
Error : package ?RcppArmadillo? could not be loaded
ERROR: lazy loading failed for package ?rugarch?
* removing ?/tmp/RtmppcKcfx/Rinst3a3130428148/rugarch?

More details here:
https://r-forge.r-project.org/R/?group_id=339&log=check_x86_64_windows&pkg=rugarch&flavor=patched

I've been unable to replicate the problem locally on either windows or 
Ubuntu x64 machines with R version 2.15.2 Patched (2012-12-04 r61215), 
and the latest Rcpp/RcppArmadillo versions from r-forge. I've not made
any changes to the source code either.
gcc/g++ are 4.6.3 20111208 (from latest R-tools for the windows machine).

Any ideas/help much appreciated.

Thanks for your time (and the excellent Rcpp* packages).

Regards,
-Alexios