Mon, 23 Apr 2012 16:30:43 +0200 wenzelm avoid conflict of Isabelle vs. Isabelle.exe on Cygwin;
Mon, 23 Apr 2012 16:05:18 +0200 wenzelm more notes on Cygwin, notably for downgrading to 1.7.9 to avoid multi-threading instabilities starting with 1.7.10 early 2012;
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