Copy image from kolourpaint Kf5 to clipboard and paste it into Krita 3.0 beta (using Create->Paste from clipboard) do same with kolourpaint from KDE SC4. View in Width and Height fields in Copy to clipboard window. Reproducible: Always
Sorry, I don't understand. Your report does not contain a description of the problem. Please describe what you expect and what really happens instead and then improve the title of this report. "kolourpaint clipboard problem" really says nothing