[GraemeJ]

An example that is very slow is attached.

Any help would be appreciated, as it really hampers its usefullness for now.

Well - he's right, this file takes a long time to load (I measured approximately five seconds) and at some four seconds a pop, page turns are way too slow to allow proper use. Once the whole lot is in memory (having gone through all the page turns first) it runs at what I would consider to be 'normal' speed.

What I can't fathom is why? I have similar sheets and they all work as one would expect. I can see no real differences between this file and mine (in fact, for whatever reason, most of mine are larger).

Let's hope Mike can nail this one, as it does make MS useless for Émile.