Comment 5 for bug 1406540

Doesn't seem like a Windows-specific proglem - it can be reproduced on OS X 10.7.5 too:

Variant A:
1) launch trunk with default (new) prefs
2) open the SVG font editor
3) open the SVG file with the SVG font
--> not listed
4) reopen the same SVG file
--> listed (in new document window)

Variant B:
1) launch trunk with default (new) prefs
2) open SVG Font editor
3) quit inkscape
4) launch inkscape again
   (now the SVG Font Editor is restored from the last session)
5) open SVG file with the SVG font
--> not listed
6) reopen same file
--> listed (in new document window)