Greetings, I had the same problem -- on the project details page the percent complete images don't load. This is because on line 1628 of details.php:
<img src=\"themes/{$flyspray_prefs['theme_style']}/percent-{$task_details'percent_complete']}.png\" $flyspray_prefs['theme_style'] is empty here -- the key them_style doesn't exist in the flyspray_prefs database. I fixed it by changing it to $project_prefs['theme_style'] so the new src tag reads: src=\"themes/{$project_prefs['theme_style']}/percent-{$task_details'percent_complete']}.png\" Upstream seems to have either fixed this or never had this because thier site does properly display the percent complete. Hope it helps someone. My appoligies if I messed up submitting this; it's my first time :-)