problem with freetagging using commas and keywords using semicolons to separate terms

I am using biblio.module 5.x-1.4 with drupal 5.2.

Bibliography module is configured so a vocabulary is asociated with freetaging. When I create a bibliography node and enter Keywords separeted by commas the freetaging recognizes each vocaubary term correctly, but the Keywords are registered as one long sentence including each keyword. When I enter the Keywords separeted by semicolons then the oposite happens: the vocabulary terms are transformed into one large sentence including each keyword, and the Keywords are recognized correctly. So freetagging uses commas and Keywords uses semicolons creating a problem

here are examples of each case
http://globaldiversity.koumbit.org/net/taxonomy/term/177

Have looked for earlier bug-report and the closest refrence is: http://drupal.org/node/154010
This relates to the comma as term separator problem.