This (combined with another bug in path handling that I haven't figured out) causes a failure to save a new project in SMILE GAME BUILDER. I was able to reproduce the error using a .NET test program with the SaveFileDialog class. It seems SaveFileDialog, by default, sets the default extension to an empty string. Wine's itemdlg responds to this by appending a "." to the filename. I do not see the extra "." on Windows. Somehow (I haven't figured out how), SMILE GAME BUILDER takes this path and creates a directory with a name ending in ".", on the unix side. When it tries to add a file to that directory, that fails, claiming part of the path could not be found. On Windows, and usually on Wine, I am able to create a directory using a name ending in ".", but the "." is ignored. -- https://gitlab.winehq.org/wine/wine/-/merge_requests/11115