Created attachment 48141 [details] backtrace from all threads Version: 1.4.0 (using KDE 4.4.3) OS: Linux after editing a number of images with various tools the editor hangs at 0% when executing the tool "Sharpen". I am not sure, but I've got the impression, it happens more often if: - I was testing the "free rotation" before (even if not applying changes) - my images already have tags and ratings Reproducible: Sometimes this issue might be related to Bug 241585
If this is the same problem as 241585, then it must indeed be a threading problem. I am still trying to reproduce.
I've recently noticed some minor ui glitch that could be related: Sometimes the progress bar is shown but always stays at 0%. Nevertheless, the process finishes correctly.
Please reopen if still applicable with a recent 2.x version