I am frustrated with this thread, as I
could repeat this 100% with X2a. I assumed it was fixed, but this thread made me go searching for it last night and I cannot. My machine hasn't changed one iota (other than updates) and installing X3, so now I am just baffled.
I did happen to find a weird one, by having Geist on a second monitor, saving the file, then trying to reopen with File->Recent Files list... X3 would "just close." When reopened the Recent Files list no longer had that file listed, but X3
only closed when using the recent file list. The file reopened by any other method fine. It is almost like a registry pointer error (i.e. X3 has the pointer, but the registry does not have the physical entry made yet). After closing SONAR manually and reopening it, the recent file option worked (issue "went away" as it were), and everything popped open onto its two monitors fine. For that one, it seems that X3 may only update the recent file listing in the registry on exit (but only speculation, of course).
I am laughing that I am actually "looking for bugs"... I am finding it very difficult to crash X3 (is almost like a red badge of courage in a way

)