can't emerge cacti on my gentoo server

[pencoat]

# emerge cacti
Calculating dependencies ...done!
>>> emerge (1 of 1) net-analyzer/cacti-0.6.8a to /
grep: /etc/apache/conf/apache.conf: No such file or directory
>>> Downloading http://gentoo.oregonstate.edu//distfiles/cacti-0.6.8a.tar.gz
--16:05:42-- http://gentoo.oregonstate.edu//distfiles/cacti-0.6.8a.tar.gz
=> `/distfiles/cacti-0.6.8a.tar.gz'
Resolving gentoo.oregonstate.edu... done.
Connecting to gentoo.oregonstate.edu[128.193.0.3]:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 207,214 [application/x-tar]

100%[========================================================================================>] 207,214 30.48K/s ETA 00:00

16:05:49 (30.48 KB/s) - `/distfiles/cacti-0.6.8a.tar.gz' saved [207214/207214]


!!! cacti-0.6.8a.tar.gz: message digests do not match!
!!! cacti-0.6.8a.tar.gz is corrupt or incomplete.
>>> our recorded digest: 800a11f1296a0f8912a386cd50d14869
>>> your file's digest: 8466cf3dbd3125778a2f4f2be2f73e38
>>> Please delete /distfiles/cacti-0.6.8a.tar.gz and refetch.

[Guest]

have you tried deleting the suspect file?
if that fails try deleting the ebuild file in question and resyncing (several time, with didfferent servers) with emerge rsync