Possible Quick Reply bug

[GotDolls]

Whenever I post a reply using Quick Reply at the end of the thread, I get a message that the form was invalid and it switches to the full editor.
If I then hit Submit (without making any changes) it works fine.
Not a major problem of course but it seems odd always to get this error.

[Tsall]

That happens when you wait to long before submitting the quick reply form. For example reding the topic, doing something else and then after a long time submit the quick reply form.