diff --git a/projects/mtg/bin/Res/test/_tests.txt b/projects/mtg/bin/Res/test/_tests.txt
index 8dc7ce29d..1caa963c7 100644
--- a/projects/mtg/bin/Res/test/_tests.txt
+++ b/projects/mtg/bin/Res/test/_tests.txt
@@ -540,6 +540,7 @@ threaten.txt
 throne_of_bone.txt
 thunder-thrash_elder.txt
 tidal_warrior_i646.txt
+tidal_warrior_i650.txt
 titanic_ultimatum.txt
 tolsimir_wolfblood.txt
 torture.txt
diff --git a/projects/mtg/bin/Res/test/tidal_warrior_i650.txt b/projects/mtg/bin/Res/test/tidal_warrior_i650.txt
new file mode 100644
index 000000000..58e3a9947
--- /dev/null
+++ b/projects/mtg/bin/Res/test/tidal_warrior_i650.txt
@@ -0,0 +1,21 @@
+#Testing Tidal Warrior's "target becomes island" ability,
+# Make sure it only lasts until end of turn
+#see http://code.google.com/p/wagic/issues/detail?id=650
+[INIT]
+FIRSTMAIN
+[PLAYER1]
+inplay:Forest, Tidal Warrior
+[PLAYER2]
+[DO]
+Tidal Warrior
+Forest
+eot
+eot
+Forest
+[ASSERT]
+UNTAP
+[PLAYER1]
+inplay:Forest, Tidal Warrior
+manapool:{G}
+[PLAYER2]
+[END]
\ No newline at end of file
diff --git a/projects/mtg/include/AllAbilities.h b/projects/mtg/include/AllAbilities.h
index ce5721aed..91f016d35 100644
--- a/projects/mtg/include/AllAbilities.h
+++ b/projects/mtg/include/AllAbilities.h
@@ -918,11 +918,14 @@ class MultiAbility: public ActivatedAbility
 {
 public:
     vector<MTGAbility *> abilities;
+    //Maintains abilities created by this instance, for cleanup
+    vector<MTGAbility *> clones;
 
     MultiAbility(int _id, MTGCardInstance * card, Targetable * _target, ManaCost * _cost);
     int Add(MTGAbility * ability);
     int resolve();
     int addToGame();
+    int destroy();
     const char * getMenuText();
     MultiAbility * clone() const;
     ~MultiAbility();
diff --git a/projects/mtg/src/ActionLayer.cpp b/projects/mtg/src/ActionLayer.cpp
index 05793a57d..75d282135 100644
--- a/projects/mtg/src/ActionLayer.cpp
+++ b/projects/mtg/src/ActionLayer.cpp
@@ -28,6 +28,11 @@ int ActionLayer::removeFromGame(ActionElement * e)
     if (isWaitingForAnswer() == e)
         setCurrentWaitingAction(NULL);
     e->destroy();
+
+    i = getIndexOf(e); //the destroy event might have changed the contents of mObjects, so we get the index again
+    if (i == -1)
+        return 0; //Should not happen, it means we deleted thesame object twice?
+
     mObjects.erase(mObjects.begin() + i);
     mCount--;
     return 1;
diff --git a/projects/mtg/src/AllAbilities.cpp b/projects/mtg/src/AllAbilities.cpp
index 6b86d0e18..044a7bf70 100644
--- a/projects/mtg/src/AllAbilities.cpp
+++ b/projects/mtg/src/AllAbilities.cpp
@@ -2163,11 +2163,23 @@ int MultiAbility::addToGame()
         MTGAbility * a = abilities[i]->clone();
         a->target = target;
         a->addToGame();
+        clones.push_back(a);
     }
     MTGAbility::addToGame();
     return 1;
 }
 
+int MultiAbility::destroy()
+{
+    for (size_t i = 0; i < clones.size(); ++i)
+    {
+        //I'd like to call game->removeObserver here instead of using forceDestroy, but I get a weird crash after that, need to investigate a bit
+        clones[i]->forceDestroy = 1;
+    }
+    clones.clear();
+    return ActivatedAbility::destroy();
+}
+
 const char * MultiAbility::getMenuText()
 {
     if (abilities.size())
diff --git a/projects/mtg/src/DeckStats.cpp b/projects/mtg/src/DeckStats.cpp
index b38e622aa..a2cb57312 100644
--- a/projects/mtg/src/DeckStats.cpp
+++ b/projects/mtg/src/DeckStats.cpp
@@ -448,7 +448,7 @@ void StatsWrapper::updateStats(DeckDataWrapper *myDeck)
         //but through a rule that is outside of the primitives. This block is a hack to address this
         const int colors[] = {Constants::MTG_COLOR_GREEN, Constants::MTG_COLOR_BLUE, Constants::MTG_COLOR_RED, Constants::MTG_COLOR_BLACK, Constants::MTG_COLOR_WHITE};
         const string lands[] = { "forest", "island", "mountain", "swamp", "plains" };
-        for (int i = 0; i < sizeof(colors)/sizeof(colors[0]); ++i)
+        for (unsigned int i = 0; i < sizeof(colors)/sizeof(colors[0]); ++i)
         {
             int colorId = colors[i];
             string type = lands[i];
diff --git a/projects/mtg/src/TestSuiteAI.cpp b/projects/mtg/src/TestSuiteAI.cpp
index 31985a136..b434f3070 100644
--- a/projects/mtg/src/TestSuiteAI.cpp
+++ b/projects/mtg/src/TestSuiteAI.cpp
@@ -491,6 +491,12 @@ int TestSuite::assertGame()
             sprintf(result, "<span class=\"error\">==Mana problem. Was expecting %i but got %i for player %i==</span><br />",
                             endState.playerData[i].manapool->getConvertedCost(), p->getManaPool()->getConvertedCost(), i);
             Log(result);
+
+            if ( endState.playerData[i].manapool->getConvertedCost() == p->getManaPool()->getConvertedCost())
+            {
+                sprintf(result, "<span class=\"error\">====(Apparently Mana Color issues since converted cost is the same)==</span><br />");
+                Log(result);
+            }
             error++;
 
         }
diff --git a/projects/mtg/src/WFilter.cpp b/projects/mtg/src/WFilter.cpp
index 81ff7a11a..2f11c6699 100644
--- a/projects/mtg/src/WFilter.cpp
+++ b/projects/mtg/src/WFilter.cpp
@@ -264,7 +264,7 @@ bool WCFilterProducesColor::isMatch(MTGCard * c)
     //Basic lands are not producing their mana through regular abilities anymore,
     //but through a rule that is outside of the primitives. This block is a hack to address this
     const string lands[] = { "dummy(colorless)", "forest", "island", "mountain", "swamp", "plains" };
-    if ((color < sizeof(lands)/sizeof(lands[0])) && c->data->hasType(lands[color].c_str()))
+    if ((color < (int)(sizeof(lands)/sizeof(lands[0]))) && c->data->hasType(lands[color].c_str()))
         return true;
 
     //Retrieve non basic Mana abilities