Is the wiki's advice about versions correct?
The text at http://www.redmine.org/projects/redmine/wiki/RedmineInstall#RedMine-Version says, "It is recommended that the majority of users install the proper point releases of redmine. RedMine currently releases a new version every 6 months..." yet the releases list at http://rubyforge.org/frs/?group_id=1850 shows updates being released much more frequently than this.
Either the text in the wiki is wrong (out of date, perhaps? Maybe Redmine really was released according to a 6 monthly schedule once upon a time...) and should be amended, or else it's confusing and should be clarified.