Since the Conservative movement tends to take most of its minhagim from the German tradition due to its German roots, most Conservative Jews in America tend to practice the German customs (such as wearing a tallis after bar mitzvah and waiting 3 hours between meat and milk).
According to Orthodox Judaism, should someone whose parents are Conservative Jews continue to follow his parents' customs, or should he follow the customs of his ancestors before them? What if he doesn't know what the customs of his great-grandparents, etc were? Does it matter whether the customs taken on by his parents are stricter or less strict than those of his ancestors (for example they were Dutch and only wait 1 hour)?
Here's an example: the common Conservative practice is to don tefilin on chol hamoed. Among Orthodox Jews, some do and others do not. Upon becoming a Baal Teshuva, should a formerly Conservative Jew put on tefilin on chol hamoed, or should he follow the practice of his rabbi?