Unfortunately MQ dont seem to publish changes for all beta releases. (esp ones which are mostly bugfixes rather than new features it seems).
Not very helpful, as they are releasing beta's publicly, so expecting some 'free' beta-testing on some level, but not giving much feedback on fixed issues.
well, at least OnTester() seems to work correctly together with the genetic optimization now (b617!)!
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The mt4 just updated to b617 from b616.
Does anybody know where (Link) I can find what has changed from built to build?