I've no idea why you can't see them, but the comments on that question are as follows:
Thanks. This error may be related to trouble described in "ExcelImporter does not allow to select an MF which returns an Integer/Long value on a Long attribute", except for that trouble occurs with Long-type (instead of Integer, in my case). How can I file this ticket/ have this ticket being filed? – Bas Vermeulen (2012-07-16)
Just make a ticket in our support portal for App Store content. – Bas van den Broek (2012-07-16)
Found it: again caching problem. Clear browsing-history (copokies/temp internet files) and it's done.