Edit Skype main.db for pending messages and delete them
:~ ${HOSTNAME}$ cd Library/Application\ Support/Skype/${USERNAME}/
sqlite3 main.db
sqlite> select * from messages
sqlite> delete from messages where id > 2904;
sqlite> .exit
:~ ${HOSTNAME}$ cd Library/Application\ Support/Skype/${USERNAME}/
sqlite3 main.db
sqlite> select * from messages
sqlite> delete from messages where id > 2904;
sqlite> .exit
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