If crafting large amounts of silver bars, it is recommended that you do NOT craft silver sickles. This is because tiaras provide more Crafting experience (2.5 more experience) and Unstrung symbols sell for almost the same (3 more coins).
Prior to an update on the 9 November2009, players could only possess one blessed sickle at a time. A method that was used to circumvent this restriction was the drop trick.
Crafting a silver sickle at the furnace on Entrana was made impossible for a while and attempting to do so would give the message, "You can't make that on Entrana; the monks will object." However, this was eventually made possible again.