The progress bar reaches the end with varying amounts of time leftover depending on song.
Changing the adjustment property for progress_bar to 10 0 100 1 0 0 (setting the page_size and page_increment to 0) seems to fix this, but this would disable seeking with the PgUp/PgDn keys.
GTK version is 2.14.5, libglade version is 2.6.2.
2009-02-17 08:58:18 UTC in LXDE - Lightweight X Desktop Environment