Evolution refuses to open some links for Firefox

In Lucid Desktop 64 bit using Evolution Installed: 2.28.3-0ubuntu10.3 & Firefox 11.0. When clicking on one of certain links in Evolution, get a popup stating "Could not open the link
                                                          Operation not supported".

For example, in attached file of one saved email message:

Firefox is OK with this link:
  *Recommendations for helpdesk ticketing software
?¿*<http://www.linkedin.com/e/-vde11o-h1dav04w-4z/vai/43875/94718070/member/eml-anet_dig-b_pd-ttl-cn/?hs=false&tok=3Y-uiZBNt0zlc1>

but Firefox not OK with this link:
                          Here is the list of 15 best open source ticketing / helpdesk products. <a href="http://www.linkedin.com/e/-vde11o-h1dav04w-4z/plh/http%3A%2F%2Fwww%2Efindbestopensource%2Ecom%2Ftagged%2Fhelpdesk/ksTD/eml-anet_dig-b_pd-pmr-cn/?hs=false&amp;tok=3cHs236650zlc1&amp;_t=tracking_disc" target="_blank">http://www.findbestopensource.com/tagged/helpdesk</a>
   Fwd:_[2]_discussions,_[3]_comments_and_[15]_jobs_on_LinkedIn (60.0 KiB, text/plain)

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: evolution 2.28.3-0ubuntu10.3
ProcVersionSignature: Ubuntu 2.6.32-41.88-generic 2.6.32.59+drm33.24
Uname: Linux 2.6.32-41-generic x86_64
Architecture: amd64
Date: Mon Apr 23 15:40:37 2012
InstallationMedia: Ubuntu 10.04.4 LTS "Lucid Lynx" - Release amd64 (20120214.2)
ProcEnviron:
 PATH=(custom, user)
 LANG=en_GB.utf8
 SHELL=/bin/bash
SourcePackage: evolution