If you have attained a voucher through the following program: http://www-1.ibm.com/certify/news/20031118a.shtml, and have not already scheduled a test appointment using that voucher that you attained, then yes, the voucher does expire on June 30, 2004.
If you have already scheduled your testing appt using the voucher, then you cannot change your testing appt date to after March 31, 2004.
Sorry, but I cannot reissue you new vouchers. It is not true that IBM reiussed new vouchers to solve this problem. We had some vouchers left over from the voucher program so we decided to use those for a different program. But since we could not change the expiration date for just some of these vouchers, we had to change the expiration date for all of the vouchers because they were from the same lot