diff --git a/src/mathed/ChangeLog b/src/mathed/ChangeLog
index 676d68c9dc..749c44d56b 100644
--- a/src/mathed/ChangeLog
+++ b/src/mathed/ChangeLog
@@ -1,3 +1,9 @@
+
+2005-08-19  Martin Vermeer  <martin.vermeer@hut.fi>
+
+	* math_nestinset.C (doDispatch): fix crash when deleting across rows
+	in math array, and block multi-cell cut/copy leading to data loss
+
 2005-07-26  Georg Baum  <Georg.Baum@post.rwth-aachen.de>
 
 	* math_factory.C (initSymbols): Don't require wasysym for the wasy
diff --git a/src/mathed/math_nestinset.C b/src/mathed/math_nestinset.C
index a71327a84e..245055ef9e 100644
--- a/src/mathed/math_nestinset.C
+++ b/src/mathed/math_nestinset.C
@@ -423,6 +423,7 @@ void MathNestInset::doDispatch(LCursor & cur, FuncRequest & cmd)
 	}
 
 	case LFUN_CUT:
+		cur.pos() = 0; // Prevent stale position >= size crash
 		cutSelection(cur, true, true);
 		cur.message(_("Cut"));
 		break;
@@ -814,7 +815,9 @@ void MathNestInset::doDispatch(LCursor & cur, FuncRequest & cmd)
 		if (rs.empty())
 			rs = ')';
 		recordUndo(cur, Undo::ATOMIC);
-		cur.handleNest(MathAtom(new MathDelimInset(ls, rs)));
+		// Don't do this with multi-cell selections
+		if (cur.selBegin().idx() == cur.selEnd().idx())
+			cur.handleNest(MathAtom(new MathDelimInset(ls, rs)));
 		break;
 	}