22-05-12, 07:40 PM
Yes it should be warning you but not losing your intended reply. What browser do you use?
In your profile, under 'Look and Layout Preferences' there's an option: 'Do not warn on new replies made while posting' which you could tick to disable this feature.
In your profile, under 'Look and Layout Preferences' there's an option: 'Do not warn on new replies made while posting' which you could tick to disable this feature.

