If not, surely it's possible to disambigute in other ways? Say, if flirble meant "big red house", but Flirble meant "a kind of jelly", then flirble could be a disambiguation page to "flirble (architecture)" and "Flirble (jelly)".
In this way, I think this is a non-discussion, since the current software already does not make distinction between 'flirble' and 'Flirble' - the first word is automatically made upper-case, also when it is inserted as lower case. So it is only when there is a difference in a further word where we get a difference, for example between "Big flirble" and "Big Flirble", or when there is a capital inside a word, between "Bigg" and "BigG".
Andre Engels