Documentation about melt.data.table in data.table - r

Question

I want to read more details about the new function in data.table v 1.8.11, after reading the link
I tried ?melt.data.table as pointed in the above link.
But there's no documents..
No documentation for melt.data.table?in specified packages and libraries:
you could try ??melt.data.table?
Here's my sessionInfo()
R version 3.0.2 (2013-09-25)
Platform: x86_64-w64-mingw32/x64 (64-bit)
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] data.table_1.8.11
Did I miss something?
EDIT On Jan20 2014
** Problems Still Not Solved**
I tried unistalled the data.table and deleted the library directory.
And then installed using the precompiled for windows in this link
> install.packages("~/Downloads/data.table_1.8.11.zip", repos = NULL)
Warning in install.packages :
package 憕/Downloads/data.table_1.8.11.zip?is not available (for R version 3.0.2)
Installing package into 慍:/Users/James/R/win-library/3.0?(as 憀ib?is unspecified)
package 慸ata.table?successfully unpacked and MD5 sums checked
The sessionInfo() is the same after reinstalling, and I put all the information here.
Still the ?melt.data.table not working.

Answer 1

[Edit by Matt] In turns out the data.table homepage was misleading (now fixed) and the Windows .zip on that page was 5 months old.
The correct way to install from R-Forge is
install.packages("data.table", repos="http://R-Forge.R-project.org").
Then the problem is solved and the documentation for ?melt.data.table is available.

Answer 2

Sorry this belongs in a comment but it's too long...
You might want to try re-installing data.table 1.8.11 (I found it here). When I do that, then start a new R session and:
library(data.table)
# data.table 1.8.11 For help type: help("data.table")
sessionInfo()
# R version 3.0.2 (2013-09-25)
# Platform: x86_64-w64-mingw32/x64 (64-bit)
#
# 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] data.table_1.8.11
#
# loaded via a namespace (and not attached):
# [1] plyr_1.8 reshape2_1.2.2 stringr_0.6.2 tools_3.0.2
Note the bit at the end. It looks like data.table 1.8.11 loads reshape2, which probably contains melt.data.table(...). Did you truncate your sessionInfo, or were they not loaded?