Created a projectile + appropriation spell in Ars Magica 1.4.0.008 in multiplayer. Zapped a tree block, it disappeared, zapped the floor, and the tree block reappeared. It worked! Zapped a villager and replaced him - also worked. Then I went to a zombie spawner and tried to capture it. Capturing it worked, but when I tried to respawn it I received an error message stating that the block could not be restored, and that perhaps the spell I was using was created with an earlier version of Ars Magica (it wasn't!). Afterwards the spell was stuck for a while - every time I tried to recast the spell I got the same error message, even though the error message also states that the block had been cleared. Restarting the server reset the spell.
Created a projectile + appropriation spell in Ars Magica 1.4.0.008 in multiplayer. Zapped a tree block, it disappeared, zapped the floor, and the tree block reappeared. It worked! Zapped a villager and replaced him - also worked. Then I went to a zombie spawner and tried to capture it. Capturing it worked, but when I tried to respawn it I received an error message stating that the block could not be restored, and that perhaps the spell I was using was created with an earlier version of Ars Magica (it wasn't!). Afterwards the spell was stuck for a while - every time I tried to recast the spell I got the same error message, even though the error message also states that the block had been cleared. Restarting the server reset the spell.