[Bug-ocrad] cannot get ocrad to recognise text in this image

[Gareth]

I use ocrad 0.16 together with fuzzyocr and spamassassin in order to detect
keywords in image spam.
I have come across one type of image layout which ocrad does not appear to
be able to recognise any text within.
You can see the image at
http://www.freespamfilter.org/forum/viewtopic.php?t=702