Using
'(minimap-major-modes (quote (prog-mode text-mode)))
which worked fine in emacs 24.x, minimap is no longer automatically opened in text-mode. minimap still works fine in for example c-mode buffers -- the minimap opens automatically and works correctly.

If I manually run minimap-mode in a buffer that's in text-mode, a minimap appears but it is non-functional -- it does not update on cursor movement or scrolling, does not respond to mouse clicks.

If I set a text buffer to e.g. c-mode, then run minimap-mode, then switch to text-mode, it works correctly.