What version are you running?
1.5 beta 2 (dev)
What steps will reproduce the problem?
1. Create a new review request using a patch from a Git repository, which creates a new file. The header of the hunk looks like this:
diff --git a/foo.py b/foo.py
new file mode 100644
index 0000000..e4da686
--- /dev/null
+++ b/foo.py
@@ -0,0 +1 @@
+Some content
2. Then, download the patch from ReviewBoard, by clicking on the "Download Diff" button. the patch contains the following content:
diff --git a/foo.py b/foo.py
--- /dev/null
+++ b/foo.py
@@ -0,0 +1 @@
+Some content
3. Using "git apply" to apply the patch, retrieved from the Reviewboard, on a repository result in the following error:
$ git apply foo.patch
error: dev/null: No such file or directory
4. If I manually update the patch file downloaded from the ReviewBoard, adding the two lines which has disappeared, the patch can be applied by git
AFAIR, the same problem occurs when the patch contains files which have been deleted.