Prompted by cnread's answer to another question, I wanted to ask: is there any difference between mĭnĭmē and mĭnŭmē?
The linked L&S entries do not offer any obvious commentary. A quick corpus search only seems to show 8 results from Sallust (7) and Pliny (1), which is a pretty poor showing compared to the 877 results for minime.
My hunch is that this is just another example of the same rule that makes Plautus write "optume" instead of "optime" and "quom" instead of "cum," but it's puzzling in that case that Plautus doesn't use "minume" and that Sallust, writing in the Golden Age, does use it.
Any insight on the best choice of word would be helpful!