Notable changes in 0.33.4 since 0.33.3 (incomplete)

May require attention

The par2 command (invoked by bup fsck -g) may generate empty recovery files if interrupted (say via C-c). To mitigate this, bup now runs par2 in a temporary directory, and only moves the recovery files into place if the generation succeeds. It will also look for any empty par2 files, or incomplete sets, associated with packfiles that it has been asked to examine. If found, they will provoke an error. See also Parchive/par2cmdline#84
Previously, any bup on REMOTE ... commands that attempted to read from standard input (for example bup on HOST split < something or bup on HOST split --git-ids ...) would read nothing instead of the original content of standard input. Now those commands will either reject the invocation, or just crash when they attempt to read a closed stream.
When building bup, if your version of GNU make is not named make, prefer invoking it directly (e.g. gmake -j4 check) instead of relying on the ./Makefile to redirect to GNU make. Some non-GNU makes now break this redirection. For example, if you include a -j option in your build command one of them adds a -J to MAKEFLAGS that GNU make rejects. In future releases, we're likely to drop the redirection entirely.

bup-config(5) has been added, and mentions that at the moment bup on REMOTE ... incorrectly reads the pack.packSizeLimit from the REMOTE repository.
bup fsck no longer requires a repository via BUP_DIR, -d, etc. when paths are provided on the command line.

Ed Maste, Greg Troxel, Johannes Berg, and Rob Browning