Fetching the handle-patch-fix branch via sftp, upgrading it, and then editing branch.conf to stack it on a local copy of trunk produces an undamaged branch.
So the primary issue here is that "bzr branch lp:~toshio/bzr-gtk/handle-patch-fix" is doing the wrong thing.
A secondary issue is that Launchpad's upgrade button for your branch seems to have failed.
Fetching the handle-patch-fix branch via sftp, upgrading it, and then editing branch.conf to stack it on a local copy of trunk produces an undamaged branch.
So the primary issue here is that "bzr branch lp:~toshio/bzr-gtk/handle-patch-fix" is doing the wrong thing.
A secondary issue is that Launchpad's upgrade button for your branch seems to have failed.