MIF and SVG output support have not been restored, yet. RTF output is inferior to other output formats supported by FOP. For details, please see the "Output Targets" page of the release you're using. Auto table layout is not implemented, yet. Footnotes may overlap with text of the region-body in multi-column documents. Space resolution does not work between footnote regions. There's a problem involving nested block-containers and reference-orientation 180/-180 (Bugzilla #36391) block-containers with no height currently don't create a fence for spaces as they should (they behave like a normal block). Preserved linefeeds in fo:character are not handled correctly. An empty block currently produces a fence for stacking constraints which it shouldn't. There are several small problems around white space handling. Images currently don't shrink so they fit on a page when they are too big and shrinking is allowed to happen. inline-container may not work as expected. letter-spacing and word-spacing properties may not work as expected. leaders with leader-pattern="use-content" may not work as expected. keep-with-previous doesn't work inside tables and lists, yet. If two consecutive pages don't have the same available width, the content currently isn't properly fit into the available space on the new page. background-images on page-number-citations are not placed correctly. Not all FO elements can be referenced by their "id", most notably: table-body, table-header, table-footer and table-row. Border and padding conditionality are not supported on table-cells, yet. Column balancing in multi-column documents may not work as expected (Bugzilla #36356)