Hi arvin,
Which are "most" of the plugins, since I think that's the other way around, most of the plugins were updated to 3.2, and those which weren't, are deprecated and are not going to continue development because their functionality is now in Osclass' core.
I'm talking about "official" plugins, I can not talk about third party plugins not developed by the Osclass team.
Anyway, with which plugins are you having problems?