* Avoid using pushd/popd in generate_descriptor_proto.sh because they are
  bash-only features, and /bin/sh is not a symlink to bash on all systems.
* If an input file is a Windows absolute path (e.g. "C:\foo\bar.proto") and
  the import path only contains "." (or contains "." but does not contain
  the file), protoc incorrectly thought that the file was under ".", because
  it thought that the path was relative (since it didn't start with a slash).
  This has been fixed.

CHANGES.txt

diff --git a/CHANGES.txt b/CHANGES.txt
index c12bc61..342b4bf 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -8,6 +8,11 @@
     had to explicitly import descriptor.proto.
   * Adjacent string literals in .proto files will now be concatenated, like in
     C.
+  * If an input file is a Windows absolute path (e.g. "C:\foo\bar.proto") and
+    the import path only contains "." (or contains "." but does not contain
+    the file), protoc incorrectly thought that the file was under ".", because
+    it thought that the path was relative (since it didn't start with a slash).
+    This has been fixed.
 
   C++
   * Generated message classes now have a Swap() method which efficiently swaps
@@ -47,6 +52,8 @@
   * Corrected ListFields() signature in Message base class to match what
     subclasses actually implement.
   * Some minor refactoring.
+  * Don't pass self as first argument to superclass constructor (no longer
+    allowed in Python 2.6).
 
 2008-09-29 version 2.0.2: