Pages unresponsive when entering text into Word table

I have a Word doc with a table, about 7 columns wide, 5 pages long.

In Pages, when I enter a cell then try to enter text, the keyboard is very, very unresponsive. After each letter press I see the key on screen in it's depressed (dark) state for ages, then about 5 seconds later the text appears on screen.

I've tried resetting the iPad, no luck.

The exact same document in Documents To Go on the same iPad is fine - totally responsive.

It's not a particularly complicated table either - all text, Arial, size 10, no colour or graphics.

Any ideas?

Thanks

 

Ok, I did some testing with the same .doc file, same iPad, but older versions of Pages, and this problem only exists in 1.2 onwards (1.2, 1.3 and 1.3.1). It DOES NOT exist in 1.1.