Version 2.4.6 of the octave-forge io package has just been released.
It's primarily a bug fix release that was a bit overdue.
In addition I've amended csv2cell() to accept spreadsheet-style address
ranges; provisionally it is to be considered experimental until it has
received more testing Out There.
When using that feature csv2cell can now read .csv files containing
varying numbers of fields per line.
See "help csv2cell".