Hi,
Some guy said do not understand how to setting image tooltips, in old version it need two steps in upload panel, in new version, you can just setting image title as tooltips, so there are just one step on editor upload panel and it is more easier, any problem please let me know, thanks.
Happy xmas. :)
http://wordpress.org/extend/plugins/wordpress-tooltips/
http://tomas.zhu.bz/wordpress-plugin-tooltips.html/
Best Regards,
Tomas