Strange apache logs

[Dragan Jovelic]

Couple of days ago I moved one web (PHP) application to new server 
running FreeBSD 6.2, with apache 2.2.8 installed. Everything is fine, 
except I have in httpd access_log lot of requests like this:

::1 - - [06/Feb/2008:13:43:58 -0500] "OPTIONS * HTTP/1.0" 200 -
::1 - - [06/Feb/2008:13:43:59 -0500] "OPTIONS * HTTP/1.0" 200 -
::1 - - [06/Feb/2008:13:44:00 -0500] "OPTIONS * HTTP/1.0" 200 -

They are appearing all the time (looks like one request every second).

Output of netstat for connections from ::1 looks like this:

# netstat -na | grep ::1
tcp6       0      0  ::1.57505              ::1.80                 TIME_WAIT
tcp6       0      0  ::1.51750              ::1.80                 TIME_WAIT
tcp6       0      0  ::1.53971              ::1.80                 TIME_WAIT
tcp6       0      0  ::1.58272              ::1.80                 TIME_WAIT
tcp6       0      0  ::1.58271              ::1.80                 TIME_WAIT
tcp6       0      0  ::1.58270              ::1.80                 TIME_WAIT
tcp6       0      0  ::1.58269              ::1.80                 TIME_WAIT
tcp6       0      0  ::1.58268              ::1.80                 TIME_WAIT

I would like to know why is this happening, what is and why sending this 
request.

Thanks in advance.