>>What's crazy about E. cap'n? Proper nouns get cap'd: We have seasons - each named is cap'd; we have days - each named is cap'd; points of the compass, months, seasons - generally where you have "sets" of nouns.
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>Here's an Example of what I Actually had in mind:
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>"there are Spaces in the Source or Destination file even when using Macro Expansion."
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>What sort of capitalization rule is at work here?

Well that isn't following any rule or guidance but is at the whim of the author. Personally, when I document a system, or, say, leave instructions, I tend to do something similar: In the above example the author wishes to make the subject files stand out. Presumably he's already referred too them prteviously, maybe even they were section headings. In this sense they've alrewdy been named and as such become sorta proper noun (phrases). I'd dispute that Space should be cap'ed tho'.