On edit smiley, if you check more than 1 box to delete, anyway you end deleting just one smiley, and not first, not last, random one.
First time I tried delete 1 and 2: deleted 2
Tried one alone: deleted
3,4,5: deleted 4
3,5,6,7: deleted 7
...
I'm running on a JoomlaPC test server, with j1.5.2 and latest SVN
EDIT: I'm dumb and I installed on live server

so this error is from a j1.5.2 running in siteground.com, apache&PHP5
EDIT 2: installed also on the JoomlaPC test server, with j1.5.2 and latest SVN and the error reproduces
Also, on edit, having same issue than rinuccio:
rinuccio wrote:
Edit smilies not work
And smileys cannot be edited cause of this... could be caused by being a test server? no SEO/SEF used