What do you mean, just copies the words? That is what this does:
strUrl = objItem.UserProperties("LinkedIn Webpage")
Browser.Navigate (strUrl)
If it didn't work before with objItem.UserProperties("LinkedIn Webpage") in navigate, this is the only way.
Does "same field of another contact" mean you want to select several contacts and run the macro to open a bunch of webpages? (FYI, I do something similar with tasks and the urls in the subject field - if you open too many at once, windows and IE become slugs.)