Sounds pretty odd...
Even the heat being off, you could try to reproduce the problem...
hornetster wrote:I WAS saving as PPT, so don't know whether that was the prob.
Could be - but it rather looks differently to me.
hornetster wrote:This is on WinXP (fully patched) and OpenOffice 2.3
Are you running 2.3.0 or 2.3.1? It tells the exact version number on the splash screen which you can access via Help - About OpenOffice.org
Just to rule out this being a bug in 2.3.0...
hornetster wrote:Since saving as an OpenOffice doc, haven't had a prob
You mean saving as .odp, right?