PLEX issues on Wednesday, January 18 (http://www.eveonline.com/news.asp?a=single&nid=4863&tid=1)
18 January 2012, 6:31 pm
We have been experiencing issues with PLEX not redeeming correctly for some players. After an investigaion, this issue can only be rectified by doing a complete reboot of Tranquility. In order to minimize the disruption to all players we will monitor the situation but we expect the next reboot will be during downtime tomorrow.
In the meantime, should a PLEX not redeem correctly for you, please see this article (http://wiki.eveonline.com/en/wiki/30_Day_Concord_Pilot_License_Extension#Move_a_Plex_back_to_redeemable_items_.28reverse_redeeming.29) on reverse redeeming a PLEX. Should that option not work, please submit a petition (https://support.eveonline.com/pages/petitions/createpetition.aspx) under ‘Billing and Account' and a GM will handle the issue for you.
Source: eveonline.com | news from EVE (http://www.eveonline.com/)