WowAce

http://www.tuxbubling.org/public/pitbull_spell_fade.patch

Basically this patch enables the same Alpha level as "notfull" when casting something -
Mount/Opening Chest/Crafting etc...

It's particularly useful when you set player frame to alpha 0 when not in combat/restoring etc...

###############
--- CombatFader.lua    2008-10-15 10:15:08.000000000 +0200
+++ CombatFader.lua    2008-10-15 23:44:26.000000000 +0200
@@ -127,6 +127,16 @@
     self:AddEventListener("PLAYER_TARGET_CHANGED", "OnFadeEvent")
     self:AddEventListener("UNIT_HEALTH", "OnPlayerHealthManaEvent")
     self:AddEventListener("UNIT_MANA", "OnPlayerHealthManaEvent")
+    self:AddEventListener("UNIT_SPELLCAST_CHANNEL_START", "OnFadeEvent")
+    self:AddEventListener("UNIT_SPELLCAST_CHANNEL_UPDATE", "OnFadeEvent")
+    self:AddEventListener("UNIT_SPELLCAST_DELAYED", "OnFadeEvent")
+    self:AddEventListener("UNIT_SPELLCAST_FAILED", "OnFadeEvent")
+    self:AddEventListener("UNIT_SPELLCAST_SUCCEEDED", "OnFadeEvent")
+    self:AddEventListener("UNIT_SPELLCAST_INTERRUPTED", "OnFadeEvent")
+    self:AddEventListener("UNIT_SPELLCAST_START", "OnFadeEvent")
+    self:AddEventListener("UNIT_SPELLCAST_STOP", "OnFadeEvent")
+    self:AddEventListener("UNIT_SPELLCAST_CHANNEL_STOP", "OnFadeEvent")
+
     self:AddRepeatingTimer(0, "UpdateAlphas")
end

@@ -144,6 +154,7 @@
         (UnitPowerType("player") == 1 and UnitMana('player') > 0) or
         (UnitPowerType("player") ~= 1 and UnitMana('player') ~= UnitManaMax('player'))
     local stop = GetTime() + self.db.profile.fadetime
+    local spell = UnitCastingInfo("player")

     if inCombat then
         for unit, frame in PitBull:IterateUnitFrames() do
@@ -166,6 +177,13 @@
                 activeframes[frame] = db[frame.group].notFullAlpha
             end
         end
+    elseif spell then
+        for unit, frame in PitBull:IterateUnitFrames() do
+            if (frame and frame.group and not db[frame.group].ignore) then
+                frame.cfstop = stop
+                activeframes[frame] = db[frame.group].notFullAlpha
+            end
+        end
     else
         for unit, frame in PitBull:IterateUnitFrames() do
             if (frame and frame.group and not db[frame.group].ignore) then