When attempting to change grid settings (layout > set grid > opacity), upon clicking “OK,” Intaglio crashes. This seems to be document-specific (a new document with a single rectangle does not crash the app).
Do please report bugs in Intaglio direct to Nick the developer by email. If you do this, in my experience, they are fixed in a timely manner and included in the next release.
Also, in my experience, bugs described on this forum are not picked up by the developer.
In the last year I have reported more than a dozen bugs to Nick and they have all been addressed in an appropriate and effective way.