In reply to j99: Sounds like nothing much has changed in 14 years...
Ended up with a trashed Ultra Quasar back in 2003 (not that surprising, six weeks pitched at 5000m+ followed by trying to camp on the Cairngorm plateau in a Winter storm) and TN were rather unhelpful and initially wanted to charge full retail price for a new flysheet and poles.
In theory, I really like the general design of the Voyager (3-pole, semi-geodesic, single porch) however I've never bern totally convinced by Terra Nova's implementation. Back in the early 2000's a friend had similar issues to those Mike just described.
The North Face Tadpole (one of my current tents) is a much better version, a bit heavier but cheaper. Unfortunately TNF discontinued it
Unfortunately, I think we all know what the solution is - bite the bullet and buy Hilleberg!