This was a quick release to fix an unfortunate bug that slipped into the 0.8.3
release. The --twisted option was disabled, as it turned out to be broken
across several platforms.
pydb is now disabled by default (due to %run -d problems). You can enable
it by passing -pydb command line argument to IPython. Note that setting
it in config file won’t work.
%pushd/%popd behave differently; now “pushd /foo” pushes CURRENT directory
and jumps to /foo. The current behaviour is closer to the documented
behaviour, and should not trip anyone.