I used Social Slider (still do) and I love it so I thought I would go Pro with it and sent off my money in the admin panel uaing PayPal for a years licence. (I have full proof obviously)
It says you will get an email immediately and be upgraded, you need do nothing except pay.
Half a week week later I was a little annoyed as nothing had happened so I went to the makers site and used his contact form to let him know I had not got my pro version. I sent full details and transaction code from PayPal.
I am STILL waiting, and I paid on the 30 Jun 2010....So much for immediate email.
I just wanted to say yes, the plugin is awesome and works on WP3 but be very wary of spending money on the Pro version.