I've been having some problems with my comment links disappearing ever since I paid to upgrade my Haloscan service. The links seem to randomly disappear throughout the day and I haven't any clue as to what is going on. This has not been a problem at my other non-upgraded blog. The folks at Haloscan have been less than helpful throughout all of this: Not responding to my e-mails, ignoring my posts in their technical service forum, and then finally giving me a weak "it's not our fault" response on Friday.
So anyway, I'm seriously considering switching to a different comment service although I hate to lose access to all my old comment, but I may not have any other choice.