Problems with 'Paste'

If I copy a paragraph of text from one topic to another (or from an external document) to a new location, the structure falls apart. I am left with lines of text no longer that 16 words, regardles of the length of the original sentences. Copy/Paste in any other application works fine.

Yesterday morning I could not copy/paste graphics (a simple arrow fron the library), I could only insert them, by the afternoon the problem had gone. Today the problem is back again.

Yesterday I could copy an entire table that included hyperlinks and snippets and then paste it in another topic, intact. Now if I copy the same table it pastes as text only (even the snippet). I can no longer copy/paste any hyperlinked text, only spaces are pasted. I have tried reinstalling but it made no difference. Does anyone have a clue as to what on earth might be going on??

I am running RH 9.02 HTML on a new 64 Bit Win 7 PC laptop. These problems have been happening since the first installation but seem to be more prevalent for some reason.

I want to include some Flash animation as well but but if RH is not stable enough should I be looking at another application?