I can get this problem on my 36" Tosh set, seems to be effecting both rear pro tvs and crt. Must be a prob with electronics Tosh are using in their sets.
Magikk i dont know if this will help when you demo problem for a tosh engineer, on tape i notice it on The Mask of Zorro,DVD The green mile and bugs life where pretty bad watch films through and note scenes where its at its worse.
I am waiting for a Tosh engineer getting back to me, i hope not but fear Tosh know all about this but are ignoring problem.
Do you get problem a lot on sky tv it drives me nuts on sky movies its a lottery if you can watch any film without this happening...