Paint is not called while dragging the mouse

We have a problem that came with 1.5x. We have a paint application and repainting the modified part of the image is solved by calling repaint by passing the clipping rect. The problem is that the paint member of the image editing component is not called while dragging the mouse (between MouseDown and MouseUp). Do you have a workaround or any idea to solve the problem? Strange that it worked with pre 1.5 versions.
Best regards,

If that was true, then almost no other apps would work properly. E.g. if you moved a slider in the juce demo, then nothing would update. You must be mistaking the cause of the problem…