This is OpenOffice_org-1.9.125-5 of SUSE Linux 10.0.

The PowerPoint file contains graphics, which seem to be in the EMF or WMF
format. (In PP 2002, if choose "Edit graphic", it tells me: "This is an imported
graphic and no group. Should it be converted into a Microsoft Office drawing
object? [yes/no]". If I choose yes, I can edit the text.)

The file shows a plot consisting of the tics ("630", "632" etc.), the legend and
a textbox. In OpenOffice, the background of both the textbox and the legend is
black. One sees the red and blue line of the legend and a "c" sticks out. Thus
I'd assume that the text is correctly drawn, but that first the boxes are filled
with a black background.

If I ungroup the graphic elements in OOo, then I can select a black-filled
rectangle (and delete it) and I can delete a black-borded rectangle. After that,
 the file looks quite ok. (Minor other bugs: The text position is shifted to the
bottom/right with regards to the rectangles & to the PP2002 results; and if I
ungroup, the graphic jumps to the top right of the page instead of keeping the
initial position.)

If I save the file in PP 2002 (both "normal" format and PP 97 format), the file
is correctly imported in OOo.

I'm not sure whether I can attach that file as I have received it in private
mail and as I haven't created that file myself (stripping down does not work,
see above). But I can send this file (275K) by mail if someone wants to investigate.