I am trying to get "captchas" to working on my Mediawiki installation, to use in conjunction with a guestbook. The author of the Mediawiki extension, which is written in php, says that the reason that the 'capchas' do not work is a problem with "certain distros" installation of php and certain features of GD. He does not elaborate. I have a out of the box installation of mediawiki, php5, and everything I can find that has 'gd' as part of it, all installed from Debian testing and up to date. The entire system seems to be working fine with no tweaking, except this particular feature. Anyone here who knows php & gd or anyone with any experience with getting this to work. BTW: When this was installed from Debian etch it all worked OK including the 'capchas' when I decided to set up a newer system on testing it does not. Thanks!! Frosty