Confirmed as an itermittent bug. I hadn't noticed the connection between the changed state of the window, but that is definitely what seems to be connected.
Latest dev NS
ESR latest in Win 7
New clean NS-only profile
Open new instance - all FX/NS defaults
This brings up what Fx decides is the best size for the display (i've given up arguing with all those settings ha!) about 2/3 of the screen.
Open a maximised window (not F11)
Invoke NS Options. Options window opens.
Return to 2/3 screen size window, invoke NS Options. Sometimes Options window fails to open.
Mostly the Options window doesn't open at first invocation, but then opens at second and following invocations.
Sometimes it will open first, but if I change to a different invocation - eg, use context menu instead of toolbar button - then it sometimes won't open again that first time, followed by working ok again.
Minimize to Win notification bar, maximize from there, invoke Options - first try usually won't work.
The line 49 error only shows when the bug does.
Latest dev NS
ESR latest in Win 7
New clean NS-only profile
Open new instance - all FX/NS defaults
This brings up what Fx decides is the best size for the display (i've given up arguing with all those settings ha!) about 2/3 of the screen.
Open a maximised window (not F11)
Invoke NS Options. Options window opens.
Return to 2/3 screen size window, invoke NS Options. Sometimes Options window fails to open.
Mostly the Options window doesn't open at first invocation, but then opens at second and following invocations.
Sometimes it will open first, but if I change to a different invocation - eg, use context menu instead of toolbar button - then it sometimes won't open again that first time, followed by working ok again.
Minimize to Win notification bar, maximize from there, invoke Options - first try usually won't work.
The line 49 error only shows when the bug does.