[BioC] can't load Rgraphviz under BioC 2.2 devel version

[Luo Weijun]

Hello all,
I install R 2.7.0 + BioC 2.2 devel version on a Mac OS
10.4 server. I have problem in loading Rgraphviz
package. Note that I have already downloaded and
installed graphviz-2.12.dmg, and Rgraphviz was
installed from source. Is it because I need a newer
version of graphviz? I tried installed Graphviz 2.14.
And I still got the same error message. Any ideas?
Thanks a lot!
Here is the error and session:

> library(Rgraphviz)
Loading required package: graph
Error in dyn.load(file, DLLpath = DLLpath, ...) : 
  unable to load shared library
'/Library/Frameworks/R.framework/Resources/library/graph/libs/ppc/graph.so':
 
dlopen(/Library/Frameworks/R.framework/Resources/library/graph/libs/ppc/graph.so,
6): Library not loaded: /usr/lib/libiconv.2.dylib
  Referenced from:
/Library/Frameworks/R.framework/Resources/library/graph/libs/ppc/graph.so
  Reason: Incompatible library version: graph.so
requires version 7.0.0 or later, but libiconv.2.dylib
provides version 5.0.0
Error: package 'graph' could not be loaded
> sessionInfo()
R version 2.7.0 beta (2008-04-13 r45283) 
powerpc-apple-darwin8.10.1 

locale:
C

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