I just happened to check the keywords list on Google Webmaster Tools for my site, which is an educational content site about finance. To my big surprise, after the first keyword, which is 'finance', I found amongst the 20 highest ranked (!) entries words like: mysql, server, adobe, flash, player, homez.

What (i'm tempted to add "the heck") does that mean ? Is that something I should worry about? If so, how did these get there and how can I eliminate these / avoid they get into that list ?

Thanks very much in advance for your help