diff --git a/src/render/symbol/filter.cpp b/src/render/symbol/filter.cpp
index 4cae4f26..870b4315 100644
--- a/src/render/symbol/filter.cpp
+++ b/src/render/symbol/filter.cpp
@@ -15,10 +15,16 @@
 // ----------------------------------------------------------------------------- : Symbol filtering
 
 void filter_symbol(Image& symbol, const SymbolFilter& filter) {
-	if (!symbol.HasAlpha()) symbol.InitAlpha();
 	Byte* data  = symbol.GetData();
 	Byte* alpha = symbol.GetAlpha();
 	UInt width = symbol.GetWidth(), height = symbol.GetHeight();
+	// HACK: wxGTK seems to fail sometimes if you ask it to allocate the alpha channel.
+	//       This manually allocates the memory and gives it to the image to handle.
+	if (!alpha) {
+		alpha = (Byte*) malloc (sizeof(Byte) * width * height);
+		memset(alpha, 255, width * height);
+		symbol.SetAlpha(alpha);
+		}
 	for (UInt y = 0 ; y < width ; ++y) {
 		for (UInt x = 0 ; x < height ; ++x) {
 			// Determine set
diff --git a/src/script/context.hpp b/src/script/context.hpp
index d3227b30..c2d3cffc 100644
--- a/src/script/context.hpp
+++ b/src/script/context.hpp
@@ -70,7 +70,7 @@ class Context {
 		Variable value;    ///< Old value of that variable.
 	};
   private:
-	/// Variables, indexed by integer naem (using string_to_variable)
+	/// Variables, indexed by integer name (using string_to_variable)
 	VectorIntMap<unsigned int, Variable> variables;
 	/// Shadowed variable bindings
 	vector<Binding> shadowed;
diff --git a/src/script/parser.cpp b/src/script/parser.cpp
index 1152f0f5..2dad2210 100644
--- a/src/script/parser.cpp
+++ b/src/script/parser.cpp
@@ -292,7 +292,7 @@ void parseExpr(TokenIterator& input, Script& script, Precedence minPrec);
 
 /// Parse an expression, possibly with operators applied. Optionally adds an instruction at the end.
 /** @param input     Read tokens from the input
- *  @param scrip     Add resulting instructions to the script
+ *  @param script     Add resulting instructions to the script
  *  @param minPrec   Minimum precedence level for operators
  *  @param closeWith Add this instruction at the end
  *  @param closeWithData Data for the instruction at the end