File name issue when installing on Ubuntu Linux

Hi,
I encountered an error while attempting to install on my Ubuntu 9.04 machine. The error message and system info are below, but here is a summary of the problem:

The installation procedure called by source(REDACTED) is trying to download the file REDACTED/OpenMx_0.1.3-776.tar.gz, but this file does not exist. I manually downloaded REDACTED/OpenMx_0.1.3-776.tgz (note .tar.gz vs .tgz) and installed it with R CMD INSTALL. Everything appears to be fine, so I think all is needed is to fix the file name suffix.

-Ista

Errors and system info follow:
source('REDACTED')
Warning in install.packages("snowfall") :
argument 'lib' is missing: using '/usr/local/lib/R/site-library'
trying URL 'http://cran.stat.ucla.edu/src/contrib/snowfall_1.70.tar.gz'
Content type 'application/x-tar' length 184206 bytes (179 Kb)
opened URL
==================================================
downloaded 179 Kb

* Installing *source* package ‘snowfall’ ...
** R
** data
** inst
** preparing package for lazy loading
** help
*** installing help indices
>>> Building/Updating help pages for package 'snowfall'
Formats: text html latex example
snowfall-a-package text html latex example
snowfall-b-init text html latex example
snowfall-c-calculation text html latex example
snowfall-d-tools text html latex example
snowfall-e-data text html latex
** building package indices ...
* DONE (snowfall)

The downloaded packages are in
‘/tmp/RtmpSfdCzb/downloaded_packages’
Warning in install.packages(pkgs = c("OpenMx"), repos = repos) :
argument 'lib' is missing: using '/usr/local/lib/R/site-library'
trying URL 'REDACTED/OpenMx_0.1.3-776.tar.gz'
Error in download.file(url, destfile, method, mode = "wb", ...) :
cannot open URL 'REDACTED/OpenMx_0.1.3-776.tar.gz'
In addition: Warning message:
In download.file(url, destfile, method, mode = "wb", ...) :
cannot open: HTTP status was '404 Not Found'
Warning in download.packages(pkgs, destdir = tmpd, available = available, :
download of package 'OpenMx' failed

R.Version()
$platform
[1] "i486-pc-linux-gnu"

$arch
[1] "i486"

$os
[1] "linux-gnu"

$system
[1] "i486, linux-gnu"

$status
[1] ""

$major
[1] "2"

$minor
[1] "9.2"

$year
[1] "2009"

$month
[1] "08"

$day
[1] "24"

$`svn rev`
[1] "49384"

$language
[1] "R"

$version.string
[1] "R version 2.9.2 (2009-08-24)"