Do the reports look ok when you look at them via Cumulus 'View' menu?
I'm guessing your problem is with the reports, not the web viewer?
Have you selected UTF-8 character set, or defaulted to your PC's code, in Cumulus 'Configuration' menu, 'NOAA Setup' screen?
From Wiki:
0 = Uses the encoding used for the viewer's operating system's default ANSI code page.
1 = Uses UTF8 (UCS Transformation Format—8-bit) format - the dominant character encoding for the World-Wide Web as using one to three bytes it represents most characters in common use covering most languages.
I'm unsure which is right for you (I actually have it ticked for me), but you could either untick (=0) or tick (=1) to reverse your current selection.
I wonder if I should be celebrating, or saddened, as this is my 300
th post!