At zero percent the progress bar still shows a small blue line. This looks broken Reproducible: Always Expected Results: There should be no fill at zero, i.e. nothing blue. And I would also think about of hiding the text.
Created attachment 95924 [details] Example of zero percent progress bar taken from KMail
What progress bar is that ? Certainly not breeze (QStyle): http://wstaw.org/m/2015/12/07/plasma-desktopz12433.png Which do not show the problem (you can check with "oxygen-demo", or "oxygen-demo5"), that is the third horizontal line of the last tab. Some background of what application was used for the screenshot would help. Best, Hugo
ha kmail (sorry I missed that) But then in fact, it does not even seems that kmail is using the breeze widget style at all on the screenshot. Could you post a screenshot of the full window ? (with sensitive information blured :))
... In fact, it looks like plastique (which is a native Qt style, and does exhibit the problem) http://wstaw.org/m/2015/12/07/plasma-desktopg12433.png Can you confirm ?
oxygen-demo5 looks okay here (blue on grey and nothing at 0% but with a smaller bar and label at the side). It might be a problem of Qt4 since my own program is linked against it and KMail afaik as well.
possibly you do not have breeze@kde4 installed on your system ... (you can compile it by hand from kf5 source code using -DUSE_KDE4=1 at cmake stage) In any case: invalid, sorry :)