I already wrote this to the google group, but as it might have a security impact I'll post again here.
blog.bitbucket.org seems to have been hacked. Look at the google cache page here: http://18.104.22.168/search?q=cache:TW4A27KmAVMJ:blog.bitbucket.org/+Its+software+licenses+through+coupon+description.+Most+new+Adobe+OnLocation+CS4&cd=1&hl=de&ct=clnk&gl=de (incidentially, this is also the first hit for the search term "Its software licenses through coupon description. Most new Adobe OnLocation CS4".
Somehow this SEO spam page is shown in my stock FF 3.5, Ubuntu 9.10. Chrome on the same system will display the blog front page.
I have dropped a stripped-down packet dump of visiting the page with both browsers at http://kevin-read.com/static/download/bitbucket.pcap
Please look into this immediately. If the blog was somehow hacked, this might have enabled access to other databases.