Hello, all!
I run an OpenBSD 4.0 system, all patches installed. The installation is

rather basic, the only port open to the world is ssh, which provides

access to a subversion server and to shell logins, both via keys, or

one-time :skey passwords. As the system is exposed to the net, I

regularly verify checksums of all files using aide (installed from

packages). So, recently I noticed the following:
# /some/path/aide --config=/my/config --update > /tmp/1

# vi /tmp/1
... snip ...
changed:/usr/lib/libasn1.a

changed:/usr/lib/libkafs_pic.a

changed:/usr/lib/libkrb5_pic.a
... snip ...
File: /usr/lib/libasn1.a

  MD5      : Wrpax8YvU84JUMMSlIZexQ==          , b5em5b4AETeIpboM+NsSQA==
File: /usr/lib/libkafs_pic.a

  MD5      : voiA+l3kYINweu83pWDfLA==          , AIjWbC687J7lD+QSDd7pwg==
File: /usr/lib/libkrb5_pic.a

  MD5      : voiA+l3kYINweu83pWDfLA==          , AIjWbC687J7lD+QSDd7pwg==
... snip ...
The previous check was on May 17, i.e. 5 days ago. After that date the

only modifications were:

- installed couple packages (wget, screen)

- edited ~/.ssh/config for one user (non-root), logged over ssh to a new

Linux system

- ran normal subversion activity, checkins, checkouts, etc.
It the above change in MD5 checksums normal? If yes, what caused it and

why nothing like this was observed before?
Best regards,

Dmitry