Version: 4.2.2 (using KDE 4.2.2) OS: Linux Installed from: Ubuntu Packages When we open a '.jpg' picture, modify it and click on 'Save' or 'Ctrl+S' (NOT 'Save as'), the program displays a 'save as' dialogu box and wants to save a new picture with extension '.jpeg'. The only way to save modifications on this picture is to replace '.jpeg' by '.jpg' in the 'save as' dialogu box. So the '.jpg' picture is overwrited but Kolourpaint do not display an "overwrite warning" before saving picture. Then if we continue to modify the picture, the 'Save' button works properly. There is no problem to modify a '.jpeg' picture, just '.jpg'.
Marking as dupe of bug 193339. Thanks *** This bug has been marked as a duplicate of bug 193339 ***