yun -y update 에러 발생

[root@service yum-2.2.2]# yum -y update
Setting up Update Process
Setting up Repos
base                      100% |=========================| 1.1 kB    00:00    
updates-released          100% |=========================|  951 B    00:00    
Reading repository metadata in from local files
base      : ################################################## 2622/2622
updates-re: ################################################## 947/947
Resolving Dependencies
--> Populating transaction set with selected packages. Please wait.
---> Package curl.i386 0:7.12.3-4.fc3 set to be updated
---> Package kernel.i686 0:2.6.12-1.1381_FC3 set to be installed
---> Package sysreport.noarch 0:1.3.13-2 set to be updated
---> Package curl-devel.i386 0:7.12.3-4.fc3 set to be updated
---> Package glibc-headers.i386 0:2.3.6-0.fc3.1 set to be updated
---> Package logwatch.noarch 0:5.2.2-1.FC3.2 set to be updated
---> Package ethereal.i386 0:0.10.13-1.FC3.1 set to be updated
---> Package nscd.i386 0:2.3.6-0.fc3.1 set to be updated
---> Package glibc-common.i386 0:2.3.6-0.fc3.1 set to be updated
---> Package glibc-devel.i386 0:2.3.6-0.fc3.1 set to be updated
---> Package openssl.i686 0:0.9.7a-42.2 set to be updated
---> Package pam-devel.i386 0:0.77-66.2.13 set to be updated
---> Package libungif.i386 0:4.1.3-1.fc3.2 set to be updated
---> Package info.i386 0:4.8-2.2 set to be updated
---> Package glibc.i686 0:2.3.6-0.fc3.1 set to be updated
---> Package openssl-devel.i386 0:0.9.7a-42.2 set to be updated
---> Package gdb.i386 0:6.1post-1.20040607.43.0.1 set to be updated
---> Package gtk2.i386 0:2.4.14-4.fc3.3 set to be updated
---> Package pam.i386 0:0.77-66.2.13 set to be updated
---> Package lm_sensors.i386 0:2.8.7-2.FC3.2 set to be updated
---> Package selinux-policy-targeted.noarch 0:1.17.30-3.19 set to be updated
---> Package texinfo.i386 0:4.8-2.2 set to be updated
---> Package kernel-smp.i686 0:2.6.12-1.1381_FC3 set to be installed
---> Package wget.i386 0:1.10.2-0.fc3 set to be updated
---> Package udev.i386 0:039-10.FC3.8 set to be updated
---> Package libgnomeui.i386 0:2.8.0-2 set to be updated
--> Running transaction check

Dependencies Resolved
Transaction Listing:
  Install: kernel.i686 0:2.6.12-1.1381_FC3 - updates-released
  Install: kernel-smp.i686 0:2.6.12-1.1381_FC3 - updates-released
  Update: curl.i386 0:7.12.3-4.fc3 - updates-released
  Update: curl-devel.i386 0:7.12.3-4.fc3 - updates-released
  Update: ethereal.i386 0:0.10.13-1.FC3.1 - updates-released
  Update: gdb.i386 0:6.1post-1.20040607.43.0.1 - updates-released
  Update: glibc.i686 0:2.3.6-0.fc3.1 - updates-released
  Update: glibc-common.i386 0:2.3.6-0.fc3.1 - updates-released
  Update: glibc-devel.i386 0:2.3.6-0.fc3.1 - updates-released
  Update: glibc-headers.i386 0:2.3.6-0.fc3.1 - updates-released
  Update: gtk2.i386 0:2.4.14-4.fc3.3 - updates-released
  Update: info.i386 0:4.8-2.2 - updates-released
  Update: libgnomeui.i386 0:2.8.0-2 - updates-released
  Update: libungif.i386 0:4.1.3-1.fc3.2 - updates-released
  Update: lm_sensors.i386 0:2.8.7-2.FC3.2 - updates-released
  Update: logwatch.noarch 0:5.2.2-1.FC3.2 - updates-released
  Update: nscd.i386 0:2.3.6-0.fc3.1 - updates-released
  Update: openssl.i686 0:0.9.7a-42.2 - updates-released
  Update: openssl-devel.i386 0:0.9.7a-42.2 - updates-released
  Update: pam.i386 0:0.77-66.2.13 - updates-released
  Update: pam-devel.i386 0:0.77-66.2.13 - updates-released
  Update: selinux-policy-targeted.noarch 0:1.17.30-3.19 - updates-released
  Update: sysreport.noarch 0:1.3.13-2 - updates-released
  Update: texinfo.i386 0:4.8-2.2 - updates-released
  Update: udev.i386 0:039-10.FC3.8 - updates-released
  Update: wget.i386 0:1.10.2-0.fc3 - updates-released
Total download size: 80 M
Downloading Packages:
warning: rpmts_HdrFromFdno: V3 DSA signature: NOKEY, key ID 4f2a6fd2
public key not available for curl-7.12.3-4.fc3.i386.rpm

제가 서버 2개 페도라3 설치 했는데... 모두 똑같이 패키지 설치시 에러가 나네요ㅠㅠ...

고수님들 도움을 부탁드립니다. ^^