Using git-bisect to find more than one breakage

Hi,

I am trying to find commits in the 2.6.18 linux tree that cause/trigger problems for a program I use. I found the first commit by using git-bisect. However, somewhere between that commit and master there is at least one more commit that breaks things. I'm sure there must be a way to find this, but the method I'm using doesn't seem to work (I'm new to git).

This is what I tried to do:
- Make a branch ("working") at the bad commit
- Commit a patch to undo the bug-causing change from that commit
- Make a copy of the master branch
- git-rebase working
- (Then if that worked, use git-bisect to find the next breakage)

I expected git-rebase to just apply all the commits from the master onto my working branch, possibly stopping in the case of a conflict to the file I patched. Instead, it produces large conflicts with unrelated files, on the very first commit it tries to apply. I even get the conflicts if the commit I make before using git-rebase changes no files at all (just adding an empty file 'test').

Is there something wrong with my method here? Is there another way to do this?

I am thinking for now I will just use git-bisect between the bad commit and master, and apply my changes to every bisection.

Any help greatly appreciated,