ntp の導入も今迄数えきれないほど行ってきました。
今回も何の問題もなく導入できました。

root@meckk:~# apt-get install ntp 
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following extra packages will be installed:
  libbsd0 libcap2 libedit2 libopts25
Suggested packages:
  ntp-doc
The following NEW packages will be installed:
  libbsd0 libcap2 libedit2 libopts25 ntp
0 upgraded, 5 newly installed, 0 to remove and 0 not upgraded.
Need to get 661 kB of archives.
After this operation, 1675 kB of additional disk space will be used.
Do you want to continue [Y/n]?
Get:1 http://ftp.jp.debian.org/debian/ squeeze/main libcap2 armel 1:2.19-3 [11.8 kB]
Get:2 http://ftp.jp.debian.org/debian/ squeeze/main libbsd0 armel 0.2.0-1 [41.4 kB]
Get:3 http://ftp.jp.debian.org/debian/ squeeze/main libedit2 armel 2.11-20080614-2 [60.2 kB]
Get:4 http://ftp.jp.debian.org/debian/ squeeze/main libopts25 armel 1:5.10-1.1 [62.8 kB]
Get:5 http://ftp.jp.debian.org/debian/ squeeze/main ntp armel 1:4.2.6.p2+dfsg-1+b1 [484 kB]
Fetched 661 kB in 7s (85.8 kB/s)
Selecting previously deselected package libcap2.
(Reading database ... 10383 files and directories currently installed.)
Unpacking libcap2 (from .../libcap2_1%3a2.19-3_armel.deb) ...
Selecting previously deselected package libbsd0.
Unpacking libbsd0 (from .../libbsd0_0.2.0-1_armel.deb) ...
Selecting previously deselected package libedit2.
Unpacking libedit2 (from .../libedit2_2.11-20080614-2_armel.deb) ...
Selecting previously deselected package libopts25.
Unpacking libopts25 (from .../libopts25_1%3a5.10-1.1_armel.deb) ...
Selecting previously deselected package ntp.
Unpacking ntp (from .../ntp_1%3a4.2.6.p2+dfsg-1+b1_armel.deb) ...
Processing triggers for man-db ...
Setting up libcap2 (1:2.19-3) ...
Setting up libbsd0 (0.2.0-1) ...
Setting up libedit2 (2.11-20080614-2) ...
Setting up libopts25 (1:5.10-1.1) ...
Setting up ntp (1:4.2.6.p2+dfsg-1+b1) ...
Starting NTP server: ntpd.
root@meckk:~#


root@meckk:~# ntpq -p 
     remote           refid      st t when poll reach   delay   offset  jitter
==============================================================================
+sylph.white-voi 150.26.2.66      2 u   53   64    3   45.306   -4.219   3.635
*rin.zone-expres 133.243.238.243  2 u   45   64    7   29.296   -2.102   1.669
+www.4koma.com   133.243.238.243  2 u   15   64    7   46.986   -3.676   1.453
-103.6.16.254    64.73.32.134     3 u   20   64   17  277.180  -32.053   0.916
root@meckk:~#

インストールしただけで、動作したように思います。
起動しない場合は、/etc/init.d/ntp start (restartになるのかな?)
解説サイトでは、トラブルが多かったようですが、私の場合は時刻の同期も自然に行っておりました。