Spontaneous crashes: no old fastresume to delete

[VincentBeers@…]

Deluge has crashed over 10 times within the last two hours. Every time it happened, my console printed the following data:

no old fastresume to delete
no old fastresume to delete
no old fastresume to delete
no old fastresume to delete
no old fastresume to delete
no old fastresume to delete
no old fastresume to delete
no old fastresume to delete
no old fastresume to delete
no old fastresume to delete
no old fastresume to delete
no old fastresume to delete
no old fastresume to delete
no old fastresume to delete
Segmentation fault (core dumped)

This is a pretty serious bug because I can't just leave Deluge on overnight... I'm using Ubuntu Gutsy and, for the first time today, the window manager Xfce (I don't know if this matters for Deluge).

Program version is actually 0.5.8.9, not 0.5.8.8.