Package: x2goclient Version: v. 4.0.5.1 (Qt - 4.8.7) To reproduce: 1. Create a new session with type *Single application* and set *Command* to "Firefox" (with first F in uppercase). Click OK to save it. 2. Choose "Session preferences" to edit the session. 3. Set *Command* to "firefox" (all letters in lowercase). 4. Either click OK to save it or just click to focus on some other field. 5. The *Command* changes back to "Firefox" (with first F in uppercase). There seems no way to correct such misspell. I had to delete and create a new session. Thanks. Best, x.