Underlining won't go away

I have the latest version of Scrivener for Windows. Every time I reboot it, after closing it down overnight, a large chunk of text that I have put in italics is always underlined as well as being in italics. I remove the underlines and keep working, and shut down Scrivener at the end of the day, but next day when I open it up the underlining is back.

Later edit: I’ve just realised that this is a small part of a huge problem with SAVING.
I’m using Windows Vista and I’m having the same saving problems being discussed in another thread on this forum. :frowning: