Pesach recap

1) Interesting case of a chumra ha-ba'ah liydei kula - someone buying clothing on Chol haMoed due to the onset of sefirah. AIUI, the former is more problematic than the latter, as engaging in commerce on Chol haMoed is assur (with the exception of cases of davar ha-aveid or tzorech ha-moed), while the issur of saying she-hechiyahu on a new garment or the like is characteristic of the period of bein ha-metzarim, not of sefirah (which only has prohibitions against weddings and haircuts {and perhaps melacha at certain times)).

2) An old gripe: Shehakol kiddushim, most commonly found on Pesach. Being that "ein kiddush ela b'makom seudah" renders a kiddush said without a subsequent seudah void[1], and that the Shulchan Aruch says that one can only be yotzei this requirement of a meal[2] using bread or wine[3] (or, according to many poskim[4], mezonos), if one eats potato starch cake following kiddush, not only is one's kiddush invalid (and perhaps a bracha l'vatalah?), but the food that he ate would l'mafrei'a be assur because of his not having made kiddush beforehand.

However, the Mishnah Berurah[5] b'shem the Chayei Adam and Eliyah Rabbah notes that the Shiltei Gibborim holds that Shabbos itself is kove'ia any food into a meal (as seen by hilchos ma'aser), so that if one is feeling weak, he can be someich on this da'as yachid (although only in the morning) and fulfill his requirement of kiddush b'makom seudah even with fruit or minei targima, so I suppose that yesh al mi lismoch, but it still sounds a bit iffy.

[1] S.A. O.Ch. 273:2
[2] Although not the requirement of the evening or morning meal as two of the shalosh seudos, which specifically require bread.
[3] S.A. O.Ch. 273:5
[4] Including the Mishnah Brurah b'shem the Magen Avraham, although IIRC, R' Akiva Eiger argues.
[5] 273:26