In private messaging if you 'd like to peruse your old message you will find the reply box below automatically copying the above message as quote.

May be because the script linked to Reply to Private Message runs as soon as the pages are reached?

It may be worthwhile not to let the script private.php?do=newpm run as soon as the page is reached.

The Site admin and the Mod may like to check and advise please?

I am not sure if this happens to my system only.