I have been developing a plugin over the last 6 months which now has almost 40,000 downloads and some great feedback, it is a great experience and although I classed myself as an advanced PHP developer when I started; I have learnt so much from other developers who have emailed me with code suggestions and fixes.
http://wordpress.org/plugins/mail-subscribe-list/
I have a small problem that I cant seem to get my head around, a very small number of people have messaged me (5) saying that they get a message when they use my plugin which says "You suck! Go hack someone else.", I can not work out how this is happening and with my plugin being so simple I decided to google and noticed that there are a small number of other WordPress plugins that are displaying the same message.
Can anyone help or give any guidance?