Text Cursor disappears

[Rob WARD]

Quite often the flashing vertical line text cursor simply disappears from a page.  Text entry can still be roughly located with the mouse cursor. However if I load another page and click in it, the cursor appears in that page, and if I return to the original page, the cursor has suddenly reappeared in it too.  Is this something about the way I have formatted my pages or is it something else? Any suggestions?