Hi, I'm proxy-maintainer of app-arch/rar. I think it's ok to stabilise 5.3.0. Note ~x86 and ~amd64 are the only arches supported by this package.
Do note, 30 days since the package has landed will elapse on the 12th. I got a bit ahead of myself (I thought I had gotten it in sooner).
amd64 : ok (builds, runs)
amd64 stable
x86 stable. Closing.