UPDATE: LinkedIn has done some great work on its mobile site and this is no longer happening (at least on an iPhone). Accessing m.linkedin.com now redirects to touch.www.linkedin.com. A very nice version of the site, that closely mirrors the iPhone Linkedin App. Well done, LinkedIn.
All those of you willing to protect your privacy online need to be aware that the mobile version of LinkedIn.com can expose your full post code on some OS/browser combinations. Fortunately this is only happening with your existing contacts and not with all searches, but this could still be too much to some of you.