I have a 1997 900 Turbo convertible that has a leaking boot, I have taken it to a saab specialist, Kentish Saab, they appeared to fix the problem, but now it has started again.
Does anyone have any experience with this problem...and if so how was it resolved

lam,
I have had the same problem in my 900s. There is a drainage tube, i think from the roof (do you have sunroof) which passes through the boot behind the trim under the speaker and connects to a drain in the floor. This has a tendency to come away from the connection on the floor and therefore drains into the boot. Easy fix is to glue using pvc glue to the rubber connector on the floor. It will be obvious if you remove the trim at the side.