Juanty aptitude install of nfs-common fails - can't obtain libevent1

I am unable to install nfs-common in jaunty. See console output below:

jem@D120108:~$ sudo aptitude install nfs-common
Reading package lists... Done
Building dependency tree
Reading state information... Done
Reading extended state information
Initializing package states... Done
The following NEW packages will be installed:
  libevent1{a} libgssglue1{a} libnfsidmap2{a} librpcsecgss3{a}
  nfs-common portmap{a}
0 packages upgraded, 6 newly installed, 0 to remove and 0 not upgraded.
Need to get 391kB of archives. After unpacking 1286kB will be used.
Do you want to continue? [Y/n/?]
WARNING: untrusted versions of the following packages will be installed!

Untrusted packages could compromise your system's security.
You should only proceed with the installation if you are certain that
this is what you want to do.

  libevent1 libnfsidmap2 librpcsecgss3 libgssglue1 portmap nfs-common

Do you want to ignore this warning and proceed anyway?
To continue, enter "Yes"; to abort, enter "No": Yes
Writing extended state information... Done
Err http://au.archive.ubuntu.com jaunty/main libevent1 1.3e-3
  500 Internal Server Error
Get:1 http://au.archive.ubuntu.com jaunty/main libgssglue1 0.1-2 [24.2kB]
Get:2 http://au.archive.ubuntu.com jaunty/main libnfsidmap2 0.21-2 [31.0kB]
Get:3 http://au.archive.ubuntu.com jaunty/main librpcsecgss3 0.18-1 [35.8kB]
Get:4 http://au.archive.ubuntu.com jaunty/main portmap 6.0-9ubuntu1 [37.8kB]
Get:5 http://au.archive.ubuntu.com jaunty/main nfs-common 1:1.1.4-1ubuntu1 [213kB]
Fetched 342kB in 4min 22s (1299B/s)
Preconfiguring packages ...
Selecting previously deselected package libgssglue1.
(Reading database ... 137771 files and directories currently installed.)
Unpacking libgssglue1 (from .../libgssglue1_0.1-2_amd64.deb) ...
Selecting previously deselected package libnfsidmap2.
Unpacking libnfsidmap2 (from .../libnfsidmap2_0.21-2_amd64.deb) ...
Selecting previously deselected package librpcsecgss3.
Unpacking librpcsecgss3 (from .../librpcsecgss3_0.18-1_amd64.deb) ...
Selecting previously deselected package portmap.
Unpacking portmap (from .../portmap_6.0-9ubuntu1_amd64.deb) ...
Processing triggers for man-db ...
Setting up libgssglue1 (0.1-2) ...

Setting up libnfsidmap2 (0.21-2) ...

Setting up librpcsecgss3 (0.18-1) ...

Setting up portmap (6.0-9ubuntu1) ...
 * Starting portmap daemon... [ OK ]

Processing triggers for libc6 ...
ldconfig deferred processing now taking place
E: Failed to fetch http://au.archive.ubuntu.com/ubuntu/pool/main/libe/libevent/libevent1_1.3e-3_amd64.deb: 500 Internal Server Error
Reading package lists... Done
Building dependency tree
Reading state information... Done
Reading extended state information
Initializing package states... Done
Writing extended state information... Done