Strange entries in Apache access_log

[Bart Haezeleer <bart.haezeleer () wim vlaanderen be>]

Since the beginning of the CodeRed disease I check my access_log file
from Apache regulary.
Today I found some strange entries that I don't know if it's serious or
not.
64.225.196.160 - - [24/Aug/2001:21:02:21 +0200] "GET /NULL.printer
HTTP/1.0" 404 280
63.251.5.46 - - [30/Aug/2001:09:20:04 +0200] "GET
http://www.yahoo.com/index.html HTTP/1.1" 200 2890

Is this something to worry about?

System Info
Version of apche 1.3.19
RedHat 7.1 with all the updates from RedHat
Connection to internet with ADSL

kind regards,
Bart




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