New release 0.52 is available in extras-devel
Changes since 0.48:
New plugins: Attachment Browser, Inline Calculator, Tags Cloud, Line sorter
Improvements include display of file paths in the notebook dialog, zim now accepting image data on copy-paste, support to organize pages by tags with an index and a tag cloud widget in the side pane, support to open pages by clicking in the link map, and several new translations.