Hi, taskwarrior 2.6.0 is released, please update. Note, that it contains fix for upstream bug 1778 (https://bug.tasktools.org/browse/TW-1778). This bug was introduced in 2.5.1 and renders it unusable for users depending on multi-byte Unicode symbols in task descriptions. If for some reason 2.6.0 update requires too many effort, please at least restore 2.5.0 in the tree.
I'm not seeing a release tarball anywhere for 2.6.0, I think that version is still in development. If we need to patch something we can just apply a patch to a new revision.
Sorry, I mistaken jira tag and git branch as a new release. Patch is available and simple, though opened a new bug 601948 for it (in order not to mix issues).