How about Hyperlynx Thermal? It is included in an ES license. No exports required!
To answer your original question, did you see that there are two DXF export formats - standard and flat? This was introduced in V9.something. I've had better luck with flat for some files. Neither one is going to pass any intelligence to ACAD though, only mechanical details.
jduquette how can I find out when the dxf flat version was made accessible?
That may solve one of he problems I have with pads dxf.
It is in V9.1; I believe it was introduced in V9.0. <File><Export>(DXF) - there will be a radio button at the top to select 'standard' or 'flat'.