Nathan - think I mentioned a few messages back - try a Geonaute HR strap. I had the same problem with my Garmin - awful!! and like you I knew it wasn't right. I have a Forerunner 310XT and the Geonaute works fine. Also find links on previous message to the ant+ website about mix and match products.
VT - still trying - thanks for asking. Accident was in the back end of April so 7 mnths gone by now. Tried to start again in August but was too soon. Now I'm only managing 12 miles a week max at the moment. Knee also took a bash and the tendons seem to be taking ages. So I'll keep plugging away - am going to do a 6K fell race in a couple of weeks so we'll see how that goes - but I won't be setting any records . I'm pretty sure HADD will get me back to a semblance of fitness at some stage along with some therapy.