- Computer Operating System,
- The XMind version no., which can be checked from the About dialog ( Help -- About on Windows/Linux and XMind -- About on Mac OS.),
- Bug description,
- The steps to reproduce this bug,
- XMind log file (the way to locate it),
- One or more screenshots (It will be better to offer this).
With these information, XMind guys can reproduce the submitted bug easily, find out why it happens and find a solution faster. If you submit a bug publicly, other XMind users will understand you quickly.