Based on recent chat (IRC) between Softcoder and Coldfusionstorm this seems to be rather a feature request for better reporting of XML errors during runtime, which (I'm trying to paraphrase Softcoder here) is not going to be fixed, since this would require rewriting parts of the external XML parser library, and, after all, there are the --validate-... options you can pass to MegaGlest for this very purpose.
Can you two confirm whether the above summary is correct, or are these separate topics?