The appdata.xml file in the 4.0 branch has a duplicated screenshot entry: $ appstream-util validate-relax org.kde.krita.appdata.xml org.kde.krita.appdata.xml: FAILED: ? tag-invalid : <screenshot> content was duplicated Validation of files failed Flatpak expects "validate-relax" to pass, but passing "validate-strict" would of course be even better (needs someone to upload adjusted screenshots, among other things).
For reference, the output of "validate-strict": $ appstream-util validate-strict org.kde.krita.appdata.xml org.kde.krita.appdata.xml: FAILED: ? tag-missing : <project_license> is not present ? tag-missing : <translation> not specified ? value-missing : <!-- Copyright [year] [name] --> is not present ? tag-invalid : <screenshot> content was duplicated ? attribute-invalid : <screenshot> width too large [https://cdn.kde.org/screenshots/krita/2018-03-17_screenshot_001.png] maximum is 1600px ? attribute-invalid : <screenshot> height too large [https://cdn.kde.org/screenshots/krita/2018-03-17_screenshot_001.png] maximum is 900px ? attribute-invalid : <screenshot> width too large [https://cdn.kde.org/screenshots/krita/2018-03-17_screenshot_005.png] maximum is 1600px ? attribute-invalid : <screenshot> height too large [https://cdn.kde.org/screenshots/krita/2018-03-17_screenshot_005.png] maximum is 900px ? attribute-invalid : <screenshot> width too large [https://cdn.kde.org/screenshots/krita/2018-03-17_screenshot_004.png] maximum is 1600px ? attribute-invalid : <screenshot> height too large [https://cdn.kde.org/screenshots/krita/2018-03-17_screenshot_004.png] maximum is 900px ? aspect-ratio-invalid : <screenshot> aspect ratio not 16:9 [https://cdn.kde.org/screenshots/krita/2018-03-17_screenshot_004.png] ? attribute-invalid : <screenshot> width too large [https://cdn.kde.org/screenshots/krita/2018-03-17_screenshot_003.png] maximum is 1600px ? attribute-invalid : <screenshot> height too large [https://cdn.kde.org/screenshots/krita/2018-03-17_screenshot_003.png] maximum is 900px ? attribute-invalid : <screenshot> width too large [https://cdn.kde.org/screenshots/krita/2018-03-17_screenshot_002.png] maximum is 1600px ? attribute-invalid : <screenshot> height too large [https://cdn.kde.org/screenshots/krita/2018-03-17_screenshot_002.png] maximum is 900px ? aspect-ratio-invalid : <screenshot> aspect ratio not 16:9 [https://cdn.kde.org/screenshots/krita/2018-03-17_screenshot_002.png] ? style-invalid : <p> is too short [It is perfect for sketching and painting, and presents an end?to?end solution for creating digital painting files from scratch by masters.] Validation of files failed
I pushed your patches, btw. I think the complaints about screenshots and a paragraph that is too short are a bit over the top...
Please make a diff on phabricator if there are still things to do, let's not clutter up bugzilla with this. If you want direct push access to maintain this file, that's fine as well. Follow https://community.kde.org/Infrastructure/Get_a_Developer_Account and mention me as the sponsor.