How odd. It may have been a case of either the export option for MV somehow not placing the file in, a version incompatibility or something else... I'll take the linux version down until I figure out a solution.
The lag on option access is a known issue that I will look in some time. For the rest such as loading save data, I'm not sure how or why would it happen, as the game has its clearing ways. Still, I will try and see why it happens.
I blame the way MV runs or loads images. Even with a preloader, there is a good chance the images won't load the first time. So, as much as I'd love to do it otherwise that's not gonna happen, at least in the current time.