There is a thread on this already started by me, it is a problem that shouldn't be there according to e-on, but it is as numerous peeps have stated.
Do us all a favour and open a ticket on it, if you don't they won't realise the full scale of the problem.

As to the actually problem, there are two solutions, either reset your downloads for Vue 8 or 7.5 and re-download and install again, this is what I had to do with over 30 objects including plants and water objects, a real disgrace!
The second one, which I haven't tried is to open them in Vue 7.5 if you have it, and resave them in that, they should then open in Vue 8....so I'm told, but I haven't tried it.

Injustice will be avenged.
Cofiwch Dryweryn.