| Strange HTTP requests for /images/blank.gif
When checking the access log of my various web sites, I notice there are random requests for a single file /images/blank.gif. Because the file does not exist, it gives 404 errors in the access log. This isn't really doing any harm, I just don't want to see 404 errors in the web server stats.
Anyone seen something similar? I'm wondering if these requests are from robots? What's the purpose of requesting an non-existent image file? | 
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