Sat, 10 Jan 2009 13:10:38 +0100 wenzelm load_thy: explicit after_load phase for presentation;
Sat, 10 Jan 2009 13:10:07 +0100 wenzelm excursion: commit_exit internally -- checkpoints are fully persistent now;
Sat, 10 Jan 2009 15:55:19 +0100 wenzelm slightly more robust matching of session name;
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