diff --git a/CHANGELOG b/CHANGELOG
index c774684..734092c 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,6 +1,7 @@
 
 innoextract 1.8 (WIP)
- - Added preliminary support for Inno Setup 5.6.2 installers
+ - Added support for pre-release Inno Setup 5.6.2 installers used by GOG
+ - Added support for a modified Inno Setup 5.5.7 variant
  - Added support for installers using an alternative setup loader magic
  - Added support for using boost_{zlib,bzip2} when statically linking Boost
  - Added support for an Inno Setup 5.5.7/5.6.0 variant with an uppercase (U) in the data version string
diff --git a/src/setup/language.cpp b/src/setup/language.cpp
index 14f14a4..e16e055 100644
--- a/src/setup/language.cpp
+++ b/src/setup/language.cpp
@@ -35,19 +35,23 @@ void language_entry::load(std::istream & is, const version & version) {
 	
 	is >> util::encoded_string(language_name, (version >= INNO_VERSION(4, 2, 2)) ? 1200u : 1252u);
 	
-	is >> util::encoded_string(dialog_font, version.codepage());
-	is >> util::encoded_string(title_font, version.codepage());
-	is >> util::encoded_string(welcome_font, version.codepage());
-	is >> util::encoded_string(copyright_font, version.codepage());
+	if(version == INNO_VERSION_EXT(5, 5,  7, 1)) {
+		util::load<boost::uint32_t>(is); // always 0?
+	}
+	
+	is >> util::binary_string(dialog_font);
+	is >> util::binary_string(title_font);
+	is >> util::binary_string(welcome_font);
+	is >> util::binary_string(copyright_font);
 	
 	if(version >= INNO_VERSION(4, 0, 0)) {
 		is >> util::binary_string(data);
 	}
 	
 	if(version >= INNO_VERSION(4, 0, 1)) {
-		is >> util::ansi_string(license_text);
-		is >> util::ansi_string(info_before);
-		is >> util::ansi_string(info_after);
+		is >> util::binary_string(license_text);
+		is >> util::binary_string(info_before);
+		is >> util::binary_string(info_after);
 	} else {
 		license_text.clear(), info_before.clear(), info_after.clear();
 	}
@@ -75,6 +79,10 @@ void language_entry::load(std::istream & is, const version & version) {
 	welcome_font_size = util::load<boost::uint32_t>(is);
 	copyright_font_size = util::load<boost::uint32_t>(is);
 	
+	if(version == INNO_VERSION_EXT(5, 5,  7, 1)) {
+		util::load<boost::uint32_t>(is); // always 8 or 9?
+	}
+	
 	if(version >= INNO_VERSION(5, 2, 3)) {
 		right_to_left = util::load_bool(is);
 	} else {
diff --git a/src/setup/version.cpp b/src/setup/version.cpp
index 08d720f..2a2a37c 100644
--- a/src/setup/version.cpp
+++ b/src/setup/version.cpp
@@ -145,13 +145,14 @@ const known_version versions[] = {
 	{ "Inno Setup Setup Data (5.4.2)",      INNO_VERSION_EXT(5, 4,  2, 0), false },
 	{ "Inno Setup Setup Data (5.4.2) (u)",  INNO_VERSION_EXT(5, 4,  2, 0), true  },
 	{ "Inno Setup Setup Data (5.5.0)",      INNO_VERSION_EXT(5, 5,  0, 0), false },
-	{ "Inno Setup Setup Data (5.5.0) (u)",  INNO_VERSION_EXT(5, 5,  0, 0), true  },
-	{ "!!! BlackBox v2?, marked as 5.5.0",  INNO_VERSION_EXT(5, 5,  0, 1), true  },
+	{ "Inno Setup Setup Data (5.5.0) (u)",  INNO_VERSION_EXT(5, 5,  0, 0), true  }, // !
+	{ "" /* BlackBox v2? */,                INNO_VERSION_EXT(5, 5,  0, 1), true  },
 	{ "Inno Setup Setup Data (5.5.6)",      INNO_VERSION_EXT(5, 5,  6, 0), false },
 	{ "Inno Setup Setup Data (5.5.6) (u)",  INNO_VERSION_EXT(5, 5,  6, 0), true  },
 	{ "Inno Setup Setup Data (5.5.7)",      INNO_VERSION_EXT(5, 5,  7, 0), false },
 	{ "Inno Setup Setup Data (5.5.7) (u)",  INNO_VERSION_EXT(5, 5,  7, 0), true  },
-	{ "Inno Setup Setup Data (5.5.7) (U)",  INNO_VERSION_EXT(5, 5,  7, 0), true  },
+	{ "Inno Setup Setup Data (5.5.7) (U)",  INNO_VERSION_EXT(5, 5,  7, 0), true  }, // !
+	{ "" /* unknown 5.5.7 (u) variant */,   INNO_VERSION_EXT(5, 5,  7, 1), true  }, // !
 	{ "Inno Setup Setup Data (5.6.0)",      INNO_VERSION_EXT(5, 6,  0, 0), false },
 	{ "Inno Setup Setup Data (5.6.0) (u)",  INNO_VERSION_EXT(5, 6,  0, 0), true  },
 	{ "Inno Setup Setup Data (5.6.2)",      INNO_VERSION_EXT(5, 6,  2, 0), false }, // Unreleased, used by GOG
@@ -243,7 +244,7 @@ void version::load(std::istream & is) {
 	
 	
 	for(size_t i = 0; i < size_t(boost::size(versions)); i++) {
-		if(!memcmp(version, versions[i].name, sizeof(version))) {
+		if(versions[i].name[0] != '\0' && !memcmp(version, versions[i].name, sizeof(version))) {
 			value = versions[i].version;
 			bits = 32;
 			unicode = versions[i].unicode;
@@ -345,8 +346,8 @@ bool version::is_ambiguous() const {
 		return true;
 	}
 	
-	if(value == INNO_VERSION(5, 5, 7)) {
-		// might be either 5.5.7 or 5.6.0
+	if(value == INNO_VERSION(5, 5, 7) || value == INNO_VERSION_EXT(5, 5, 7, 1)) {
+		// might be either 5.5.7, an unknown modification of 5.5.7, or 5.6.0
 		return true;
 	}