Saved changes but not showing when drawing is reopened.

[tmgabler]

But changes are visible in drawing preview/thumbnail.  Also, random changes are saved.  For instance some changes I made yesterday and saved are not showing up while changes I made today are.  Essentially I am missing most of my work from today.  I did save the drawing as 3 different drawings prior to closing and each drawing now shows something different.   

[pendean]

Where are you saving to? Your Windows version? File Location details? Did this just start happening? What else is new? is the problem one file? Is anyone else working on your file?

it would appear you are not opening the same file: does LT's history listing under the big red A open the correct file?