diff --git a/util/classpath/ClassLoaders.scala b/util/classpath/ClassLoaders.scala
index b308fcd1a..1ee1bfc72 100644
--- a/util/classpath/ClassLoaders.scala
+++ b/util/classpath/ClassLoaders.scala
@@ -8,7 +8,7 @@ import java.net.{URI, URL, URLClassLoader}
 
 /** This is a starting point for defining a custom ClassLoader.  Override 'doLoadClass' to define
 * loading a class that has not yet been loaded.*/
-abstract class LoaderBase(urls: Seq[URL], parent: ClassLoader) extends URLClassLoader(urls.toArray, parent) with NotNull
+abstract class LoaderBase(urls: Seq[URL], parent: ClassLoader) extends URLClassLoader(urls.toArray, parent)
 {
 	require(parent != null) // included because a null parent is legitimate in Java
 	@throws(classOf[ClassNotFoundException])
diff --git a/util/datatype/DatatypeParser.scala b/util/datatype/DatatypeParser.scala
index 4350f450f..f47a6a8d9 100644
--- a/util/datatype/DatatypeParser.scala
+++ b/util/datatype/DatatypeParser.scala
@@ -1,10 +1,11 @@
 /* sbt -- Simple Build Tool
  * Copyright 2009  Mark Harrah
  */
-package xsbt.api
+package xsbt
+package api
 
 import java.io.File
-import xsbt.FileUtilities
+import sbt.IO.read
 import Function.tupled
 import java.util.regex.Pattern
 
@@ -30,7 +31,7 @@ class DatatypeParser extends NotNull
 		}
 		open ++ closed
 	}
-	def parseLines(file: File): Seq[Line] = getLines(FileUtilities.read(file)).toList.zipWithIndex.map(tupled(parseLine))
+	def parseLines(file: File): Seq[Line] = getLines(read(file)).toList.zipWithIndex.map(tupled(parseLine))
 	def getLines(content: String): Seq[String] = content split "(?m)$(?s:.)(?!$)*(^|\\Z)"
 	def parseLine(line: String, lineNumber: Int): Line =
 		matchPattern(WhitespacePattern -> processWhitespaceLine _, EnumPattern -> processEnumLine _,
diff --git a/util/datatype/Generator.scala b/util/datatype/Generator.scala
index 442800776..a6eeec5e7 100644
--- a/util/datatype/Generator.scala
+++ b/util/datatype/Generator.scala
@@ -5,7 +5,7 @@ package xsbt
 package api
 
 import java.io.File
-import xsbt.FileUtilities
+import sbt.IO.write
 
 import Generator._
 
@@ -25,10 +25,10 @@ abstract class GeneratorBase(val basePkgName: String, val baseDirectory: File) e
 
 	def writeSource(name: String, pkgName: String, content: String)
 	{
-		import Paths._
-		val file =baseDirectory / packagePath(pkgName) / (name+ ".java")
+		import sbt.Paths._
+		val file = baseDirectory / packagePath(pkgName) / (name+ ".java")
 		file.getParentFile.mkdirs()
-		FileUtilities.write(file, "package " + pkgName + ";\n\n" + content)
+		write(file, "package " + pkgName + ";\n\n" + content)
 	}
 	private def packagePath(pkgName: String) = pkgName.replace('.', File.separatorChar)
 }
diff --git a/util/log/BufferedLogger.scala b/util/log/BufferedLogger.scala
index 1a72e022d..689d21b14 100644
--- a/util/log/BufferedLogger.scala
+++ b/util/log/BufferedLogger.scala
@@ -54,7 +54,7 @@ class BufferedLogger(delegate: AbstractLogger) extends AbstractLogger
 		delegate.setLevel(newLevel)
 	}
 	def getLevel = delegate.getLevel
-	def traceEnabled = delegate.traceEnabled
+	def getTrace = delegate.getTrace
 	def setTrace(level: Int)
 	{
 		buffer  += new SetTrace(level)
diff --git a/util/log/LoggerWriter.scala b/util/log/LoggerWriter.scala
index b3b2d54d3..885646973 100644
--- a/util/log/LoggerWriter.scala
+++ b/util/log/LoggerWriter.scala
@@ -22,7 +22,7 @@ class LoggerWriter(delegate: AbstractLogger, level: Level.Value, nl: String) ext
 		}
 	override def write(content: Array[Char], offset: Int, length: Int): Unit =
 		synchronized {
-			buffer.append(content, offset, length)
+			buffer.appendAll(content, offset, length)
 			process()
 		}