At some point during your foray into XBMC, you will likely come up against a problem that isn't made 100% clear from errors in the GUI. This is where the log file comes into play. XBMC writes all sorts of useful stuff to its log, which is why it should be included with every bug/problem report.
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- Log file/Easy - Did someone send you to this page or ask for the debug log, xbmc.log, or log file? You'll probably want to use this easy guide!
- Log file/Advanced - The original log file page with full technical explanation.