This post was published initially with a a typo in the URL. blogger.com does not offer any tool to change the URL after first time publish, therefore the post was moved to a new page.
Click here to get to the SIP Communicator post.
Btw, reading the help pages for posts URLs, I really find it ugly solution to publish first your post with the title including only the words you want in URL (which becomes permalink, forever) and then edit again the title to what you want as title. Com'on G!, you can do a bit better here!