Hello :-)
After several times I made doubt myself on this probable bug/thing, here are my observations:
I noticed on some times, even if I save my modifications in a script (and it's been correctly compiled), close the editing window, then re-open this script, the previous modifications are discarded and the code is back to a [random]previous version.
I've no precise regular factors to tell when this would happen as it happens randomly, even if I have some suppositions/clues of what could bypass a normal save: I use to work/save the script on some laggy sim; my script is in HUD-worn object; in my script I have a changed(integer iC) iC & CHANGED_INVENTORY; it appears to happen more often between 10:00AM SLT 11:00PM SLT (which I figure out is time during SL is more crowded/laggy).
Any advice or idea about this?
Have a nice day!