please bump the gem version also to include the rows feature
seems that 0.6 does have issues with first row , but the git version doesn't
the error is not about the adapter seems that the model/table is wrong ....
I suspect a dialect 1 database and mixed-case table names are behind the errors. A backup/restore may solve Nielson's issue.
Actually, it turns out it is gfix which is required: http://www.firebirdsql.org/manual/gfix-dialect.html
Thanks i have added your response , i never use dialect 1 this is why i didn't understood the issue :)