[BioC] browserView does not work in 'rtracklayer' [failure to coerce "CompressedIntegerList"]

[LiGang]

browserView does not work in 'rtracklayer' [failure to 
coerce "CompressedIntegerList"]


library(rtracklayer)
browserSession("UCSC")->session
browserView(session, GenomicRanges(start=10000,end=100000, 
chrom="1",genome="hg18"))

### Error in as.character.default(<S4 object of 
class "CompressedIntegerList">) : 
### no method for coercing this S4 class to a vector

#==================================
sessionInfo()
R version 2.10.0 Under development (unstable) (2009-09-14 r49685) 
i386-pc-mingw32 

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

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

other attached packages:
[1] rtracklayer_1.5.14 RCurl_1.2-0        bitops_1.0-4.1    

loaded via a namespace (and not attached):
[1] Biobase_2.5.6      Biostrings_2.13.40 BSgenome_1.13.12   
IRanges_1.3.77     Rcompression_0.6-0 XML_2.6-0