Conversion from 0.8.0 to 0.9.0 drops encrypted arrow links AKA connectors. An arrow link is dropped when it connects two children (direct descendants) of an encrypted node; when the source and target node of an arrow link are located deeper within an encrypted node, no problem seems to occur.
See the attached mind map, and the node "encrypted node ...", in which the child node "Source 1" should be connected by an arrow link to "Target 1" after a conversion to 0.9.0, but it is not. An arrow link that leads from "Source 2" to "Target 2" (from bottom to top) does not get dropped
FreeMind version: 0.9.0 RC4-RC14 and possibly earlier. RC4-RC7 do not drop the arrow links from "Source 1" to "Target 1" but rather the one from "Source 2" to "Target 2"--this is probably because they erroneously change the order of the children of an encrypted node, a bug that has been reported as another bug report and fixed.
Environment: Windows Vista, Java 1.6.0_21 (probably does not matter).