doug ~  $  sudo pacman -Syu
Password: 
:: Synchronizing package databases...
 core is up to date
 extra is up to date
 community is up to date
:: Starting full system upgrade...
 local database is up to date
doug ~  $  sudo pacman -S dia
resolving dependencies...
looking for inter-conflicts...

Targets (1): dia-0.97-2  

Total Download Size:    5.32 MB
Total Installed Size:   22.32 MB

Proceed with installation? [Y/n] y
:: Retrieving packages from extra...
error: failed retrieving file 'dia-0.97-2-x86_64.pkg.tar.gz' from mirror.csclub.uwaterloo.ca : Success
warning: failed to retrieve some files from extra
error: failed to commit transaction (Success)
Errors occurred, no packages were upgraded.
doug ~  $  sudo pacman -S dia --debug
debug: config: attempting to read file /etc/pacman.conf
debug: config: new section 'options'
debug: config: HoldPkg: pacman
debug: config: HoldPkg: glibc
debug: config: SyncFirst: pacman
debug: config: new section 'core'
debug: setlibpaths() called
debug: option 'cachedir' = /var/cache/pacman/pkg/
debug: registering sync database 'core'
debug: config: including /etc/pacman.d/mirrorlist
debug: config: attempting to read file /etc/pacman.d/mirrorlist
debug: adding new server URL to database 'core': ftp://mirror.csclub.uwaterloo.ca/archlinux/core/os/x86_64
debug: config: finished parsing /etc/pacman.d/mirrorlist
debug: config: new section 'extra'
debug: registering sync database 'extra'
debug: config: including /etc/pacman.d/mirrorlist
debug: config: attempting to read file /etc/pacman.d/mirrorlist
debug: adding new server URL to database 'extra': ftp://mirror.csclub.uwaterloo.ca/archlinux/extra/os/x86_64
debug: config: finished parsing /etc/pacman.d/mirrorlist
debug: config: new section 'community'
debug: registering sync database 'community'
debug: config: including /etc/pacman.d/mirrorlist
debug: config: attempting to read file /etc/pacman.d/mirrorlist
debug: adding new server URL to database 'community': ftp://mirror.csclub.uwaterloo.ca/archlinux/community/os/x86_64
debug: config: finished parsing /etc/pacman.d/mirrorlist
debug: config: finished parsing /etc/pacman.conf
debug: registering local database
debug: loading package cache for repository 'local'
debug: loading package cache for repository 'core'
debug: loading package cache for repository 'extra'
debug: adding package dia-0.97-2 to the transaction targets
resolving dependencies...
debug: resolving target's dependencies
debug: started resolving dependencies
debug: checkdeps: package dia-0.97-2
debug: finished resolving dependencies
debug: started sorting dependencies
debug: sorting dependencies finished
looking for inter-conflicts...
debug: looking for conflicts
debug: check targets vs targets
debug: check targets vs targets
debug: check targets vs db and db vs targets
debug: check targets vs db
debug: check db vs targets
debug: checking dependencies
debug: checkdeps: package dia-0.97-2
debug: setting download size 5577807 for pkg dia

Targets (1): dia-0.97-2  

Total Download Size:    5.32 MB
Total Installed Size:   22.32 MB

Proceed with installation? [Y/n] y
debug: using cachedir: /var/cache/pacman/pkg/
:: Retrieving packages from extra...
debug: using 'dia-0.97-2-x86_64.pkg.tar.gz' for download progress
debug: existing file found, using it
debug: HTTP_PROXY: (null)
debug: http_proxy: (null)
debug: FTP_PROXY:  (null)
debug: ftp_proxy:  (null)
error: failed retrieving file 'dia-0.97-2-x86_64.pkg.tar.gz' from mirror.csclub.uwaterloo.ca : Success
warning: failed to retrieve some files from extra
error: failed to commit transaction (Success)
Errors occurred, no packages were upgraded.
debug: unregistering database 'local'
debug: freeing package cache for repository 'local'
debug: unregistering database 'core'
debug: freeing package cache for repository 'core'
debug: unregistering database 'extra'
debug: freeing package cache for repository 'extra'
debug: unregistering database 'community'