If you are writing too much text or pasting something, it can happen that the server disconnects you because of "excess flood".
Quassel should have an option to buffer messages and so prevent to get you kicked out of IRC.
#1 Updated by Sputnick about 15 years ago
Hint: Token Bucket
#2 Updated by phon about 15 years ago
NetworkConnection::putRawLine is now "secured" by a token-bucket:
bucket size aka burst size is (for now) set to 5
the cbr is set to 1 msg per second.