Actually, comparing Sigil 1.0 to Sigil 1.4.3, Sigil 1.4.3 is much more stable with many fewer bugs in general than Sigil 1.0. And this particular issue was not a bug at all, just a misunderstanding that any user dictionary can be made to be the Default.
If any serious bugs end up in a release, we make quick follow-up releases. So just like anything else, when a new release is announced you can take a wait and see approach as long as you are happy with your particular version.
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