comment authentication problems

[Guy Katz]

hi all; i am using roller 2.3,mysql,tomcat 5.5.17
i am having some problems with comment authentication (using's roller's default 
mechanism).
it seems that the methematical question stays the same and when writing the 
answer for the second time (second comment i want to add) it states that the 
authentication failed.
i can't state the exact scenario to duplicate this but it happens al the time.
any suggestions?
thanks in advance.