It works for me and unpacks correctly and has a valid checksum:
Code:
wget http://files2.zimbra.com/downloads/7.1.2_GA/zcs-7.1.2_GA_3268.UBUNTU10_64.20110804130819.tgz
asking libproxy about url 'http://files2.zimbra.com/downloads/7.1.2_GA/zcs-7.1.2_GA_3268.UBUNTU10_64.20110804130819.tgz'
libproxy suggest to use 'direct://'
--2011-08-13 09:06:00-- http://files2.zimbra.com/downloads/7.1.2_GA/zcs-7.1.2_GA_3268.UBUNTU10_64.20110804130819.tgz
Resolving files2.zimbra.com... 79.140.93.171, 79.140.93.153
Connecting to files2.zimbra.com|79.140.93.171|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 615728046 (587M) [binary/octet-stream]
Saving to: `zcs-7.1.2_GA_3268.UBUNTU10_64.20110804130819.tgz'
100%[============================================>] 615,728,046 503K/s in 20m 18s
2011-08-13 09:26:18 (494 KB/s) - `zcs-7.1.2_GA_3268.UBUNTU10_64.20110804130819.tgz' saved [615728046/615728046]
md5sum -c zcs-7.1.2_GA_3268.UBUNTU10_64.20110804130819.tgz.md5
zcs-7.1.2_GA_3268.UBUNTU10_64.20110804130819.tgz: OK