diff --git a/CHANGELOG b/CHANGELOG
index e0a02d0..ce27724 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,16 @@
+Version 0.8.6 prerelease (2009.10.07):
+    * fixed:   UInt::SetBitInWord(uint & value, uint bit) set 1 if the bit was
+               equal 1 (should be set 2)
+               this affected only no-asm parts - when macro TTMATH_NOASM was defined
+    * fixed:   UInt<value_size>::MulInt(uint ss2)
+               there was a buffer overflow when value_size was equal 1
+    * fixed:   UInt::AddVector() and UInt::SubVector() didn't want to compile
+               when macro TTMATH_NOASM was defined
+    * fixed:   Big::operator>> didn't correctly recognize values in scientific mode (with 'e' character)
+    * fixed:   Int::FromString(const tt_string & s, uint b = 10)
+               didn't use 'b' (always was '10')
+
+
 Version 0.8.5 (2009.06.16):
     * fixed:   Big::Mod(x) didn't correctly return a carry
                and the result was sometimes very big (even greater than x)
diff --git a/ttmath/ttmathbig.h b/ttmath/ttmathbig.h
index 6c909ec..fc0760c 100644
--- a/ttmath/ttmathbig.h
+++ b/ttmath/ttmathbig.h
@@ -4160,9 +4160,11 @@ public:
 	{
 	std::string ss;
 	
-	// 'char' for operator>>
-	unsigned char z;
+	// char for operator>>
+	char z, old_z;
 	bool was_comma = false;
+	bool was_e     = false;
+	
 
 		// operator>> omits white characters if they're set for ommiting
 		s >> z;
@@ -4172,25 +4174,44 @@ public:
 			ss += z;
 			s >> z; // we're reading a next character (white characters can be ommited)
 		}
+		
+		old_z = 0;
 
 		// we're reading only digits (base=10) and only one comma operator
-		for( ; s.good() ; z=s.get() )
+		for( ; s.good() ; z=static_cast<char>(s.get()) )
 		{
 			if( z == TTMATH_COMMA_CHARACTER_1 ||
 			  ( z == TTMATH_COMMA_CHARACTER_2 && TTMATH_COMMA_CHARACTER_2 != 0 ) )
 			{
-				if( was_comma )
-					// second comma operator
+				if( was_comma || was_e )
+					// second comma operator or comma operator after 'e' character
 					break;
 
 				was_comma = true;
 			}
 			else
+			if( z == 'e' || z == 'E' )
+			{
+				if( was_e )
+					// second 'e' character
+					break;
+
+				was_e = true;
+			}
+			else
+			if( z == '+' || z == '-' )
+			{
+				if( old_z != 'e' && old_z != 'E' )
+					// '+' or '-' is allowed only after 'e' character
+					break;
+			}
+			else
 			if( UInt<man>::CharToDigit(z, 10) < 0 )
 				break;
 
 
-			ss += z;
+			ss   += z;
+			old_z = z;
 		}
 
 		// we're leaving the last read character
diff --git a/ttmath/ttmathint.h b/ttmath/ttmathint.h
index 71231ca..fcbbcfc 100644
--- a/ttmath/ttmathint.h
+++ b/ttmath/ttmathint.h
@@ -963,7 +963,7 @@ public:
 	*/
 	uint FromString(const std::string & s, uint b = 10)
 	{
-		return FromString( s.c_str() );
+		return FromString( s.c_str(), b );
 	}
 
 
diff --git a/ttmath/ttmathtypes.h b/ttmath/ttmathtypes.h
index a27f58f..7b82cce 100644
--- a/ttmath/ttmathtypes.h
+++ b/ttmath/ttmathtypes.h
@@ -64,8 +64,8 @@
 */
 #define TTMATH_MAJOR_VER		0
 #define TTMATH_MINOR_VER		8
-#define TTMATH_REVISION_VER		5
-#define TTMATH_PRERELEASE_VER	0
+#define TTMATH_REVISION_VER		6
+#define TTMATH_PRERELEASE_VER	1
 
 
 /*!
diff --git a/ttmath/ttmathuint.h b/ttmath/ttmathuint.h
index 2605cb5..06a408b 100644
--- a/ttmath/ttmathuint.h
+++ b/ttmath/ttmathuint.h
@@ -768,8 +768,7 @@ public:
 		{
 			MulTwoWords(u.table[x1], ss2, &r2, &r1 );
 			
-			
-			if( x1 <= value_size - 2 )
+			if( value_size>1 && x1<=value_size-2  )
 			{
 				if( AddTwoInts(r2,r1,x1) )
 					return 1;
diff --git a/ttmath/ttmathuint_noasm.h b/ttmath/ttmathuint_noasm.h
index c301fc5..636e582 100644
--- a/ttmath/ttmathuint_noasm.h
+++ b/ttmath/ttmathuint_noasm.h
@@ -224,7 +224,7 @@ namespace ttmath
 		for( ; i<ss1_size ; ++i)
 			c = AddTwoWords(ss1[i], 0, c, &result[i]);
 
-		TTMATH_LOG("UInt::AddVector")
+		//TTMATH_LOG("UInt::AddVector")
 
 	return c;
 	}
@@ -351,7 +351,7 @@ namespace ttmath
 		for( ; i<ss1_size ; ++i)
 			c = SubTwoWords(ss1[i], 0, c, &result[i]);
 
-		TTMATH_LOG("UInt::SubVector")
+		//TTMATH_LOG("UInt::SubVector")
 
 	return c;
 	}
@@ -553,7 +553,7 @@ namespace ttmath
 
 		uint mask = 1;
 
-		if( bit > 1 )
+		if( bit > 0 )
 			mask = mask << bit;
 
 		uint last = value & mask;