Deleting a cloned block (no deletion: link corrupted)

[Gabri]

Last github version.
I tried to clone a block (ie: Slider and Navigation), after when I clicked on the "delete" link on the cloned items (and after confirming the alert) browser has been redirect on Dashboard, no messages and above all no deletion of blocks.
Probably it's something easy, when I tried the procedure again I found that urls on "delete" links are corrupted:
http://localhost/qa/admin/block/manage/delete/%7B17
instead (I presume)
http://localhost/qa/admin/block/manage/delete/17

Gabri