Created attachment 193948 [details] Screen shot of release notes message and button After upgrading to 24.2, the Release Notes button is black on dark blue when active if macOS's "increase contrast" setting is on. Steps: 1. Apple Menu, then System Settings 2. Click Accessibility, then Display 3. Set increase contrast to On 4. Launch an version of LibreOffice older than 24.2 5. In the Help Menu, choose Check for Updates 6. Download the latest version of LibreOffice 24.2 7. Close LibreOffice 8. Install the download 9. Launch LibreOffice 10. Open an existing spreadsheet 11. Click the button Release notes 12. Cmd-tab to return to LibreOffice Expected result: The Release notes button text has good contrast with the background Actual result (screenprint attached): The Release notes button text has poor contrast with the background, failing WCAG 2.0 and being barely readable