Error checking has been added to the argument parsing of resizecons; unfortunately, it checks arguments before they have been parsed, so it always fails. All formats for resizecons were broken except usage and version. I e-mailed a patch to suggest; I'll e-mail it to bugzilla as soon as I've got a bug ID to attach to it.
Try the Raw Hide console-tools first. At least --lines XX is functional there.
This problem appears to be resolved. Please reopen if I'm wrong.