During the save option within Sketchup 2018, to save the .svg file, if the user types .svg in the save file name the system ignores it and appends a .svg file extension anyways. System should check if the user has already added the .svg in the file name and use that as the extension instead of always appending .svg. It’s petty, but as a software developer I’ve always parse the user input and see if they added an extension.
Yup, that’s on our list. I know it’s super annoying. Look for an update on that one soon!