B2B Live TBC 2.4.3

Relikte lösen beim Tauschen während des Kampfes einen 1,0 Sek CD aus. Dieser CD kann durch Makros (/eq..../cast...) bei uns umgangen werden, was nicht sein dürfte.

http://www.wowhead.com/forums&topic=44247/paladin-libram-macro
"Swapping anything in a weapon slot (be it a shield, a relic (libram, etc), or actual weapon) while in combat will cancel any cast currently in progress and trigger a GCD. This was done intentionally, as macros such as yours effectively allowed players to have two relics/weapon enchants at once."

http://www.wowhead.com/item=33502/libram-of-mending#comments:id=185695
"This is not true, if you change libram while casting a heal, with any of the macros exemplified above (I did bother checking all of them again), the GCD does not coincide and will actually be recast. This was tested on 2.3 PTR just today, will check again on live later. With the removal of client-server delay, bypassing the GCD of the libram swap does not work in practice really."

http://forums.elitistjerks.com/topic/50927-resto-totem-relic-swapping-macros/
"1) If you are casting a heal and click on the macro it will give the message as it needs to wait for the heal to finish to swap items.
2) When you change any gear on your character it triggers the GCD (as the post above mentions), so that effectively lowers your overall healing done during the entire time of the raid."

Es gibt widersprüchliche Quellen, da es wohl bis Patch 2.4.3 möglich war, mit Castbeginn einen gleichzeitigen Switch CD auszulösen, der aber vor dem Castende endete und so dennoch den Effekt auf den Spell übertrug. Dieser Bug unterscheidet sich allerdings von unserem.
http://www.wowwiki.com/Patch_2.4.3
"Equipping an item will now cancel any spell cast currently in progress."