SUMMARY While renaming some of my media files I noticed that on one specific combination of files, Dolphin would remove the file extension on one of the files. I can consistently reproduce this with test files, but on different file types it seems fine. It *might* have to do with unknown/unassigned file extensions. STEPS TO REPRODUCE 1. touch file.idx file.sub 2. Select both files in Dolphin 3. F2 or Right-Click -> Rename 4. Enter a new name, e.g. "test" (no # since there's no counter required) 5. Hit Rename OBSERVED RESULT $ ls test test.sub EXPECTED RESULT Dolphin should keep the file extension in all cases, i.e. correct would be: $ ls test.idx test.sub SOFTWARE/OS VERSIONS Operating System: Fedora Linux 40 (KDE Spin) KDE Plasma Version: 6.1.4 KDE Frameworks Version: 6.5.0 Qt Version: 6.7.2 ADDITIONAL INFORMATION I tried the same with a couple other file extensions: mkv & mp4 -> fine log & txt -> fine jpg & gif ext1 & ext2 -> would not allow me to rename without adding a counter, when adding a counter it removes both file extensions idx & sub (see above) -> idx is an "unknown" filetype i.e. right click brings up the "Open With…" option, while the sub file is recognised as a text file and brings up "Open With KWrite"