Koha 3.0.5 was released a couple of days ago. It is a stable release of the 3.0.x tree and includes about 100 patches with bug fixes and translations:
The full release notes are here.
Due to the fact the Release Maintainer does not have access to the download.koha.org site (don’t ask) it is hosted at the koha-fr.org site until someone at Liblime puts it in the right place.
If you are familiar with git you can upgrade that way
git reset v3.00.05