I had the same fake falsh update popup, but that did not happen on the same website (cant remember ...)
I did dowload the version provided by the fake popup, and then, i went on genieo's official website to download their own version ...
here are the changes :
official md5:9426293f02b056a44f9e64e16aac20d8
fake md5:cdc43c6ff0ba8dc85d10fecd61715c45
when i right-clic on the files in finder to have more info :
official size:691 097 octets
official comming from:http://download.genieo.com/partner/genieo/mac_release/live/InstallGenieo.dmg, http://www.genieo.com/
fake size:691 179 octets
fake comming from:http://download.genieo.com/partner/webpic/mac_release/live/InstallGenieo.dmg, http://superdownloaderssite.info/
content of http://superdownloaderssite.info/ (wich name has no relation with the name of "genieo"), only contains a small text and point to a link to download genieo ... i don't know if it's really suspicious, maybe ?
to stop any speculation, maybe the best is to decompile the two version to check what are these 100 octects plus in the fake version, but i don't have the knowledge to do that, but i can provide the two files;)
edit
anyway, for those who want to remove genieo, the procedure is here : http://www.genieo.com/faq#uninstall
Message was edited by: naja_trance