Error core 90k, followed by error code 5003 (October 15, 2013, 5:20pm Eastern)

[Arrik]

Time: 12:20 AM Eastern
Frequency: Second time now
World Name: Ragnarok
Character Name: Laura Bailey
NPC Name: N/A
Monster Name: N/A
Class/Level: Bard 50
Party/Solo: Solo
In-game Time:N/A
Area/Coordinates: New Gridania (12,12)
Steps:
1. Was idle both times, in between Titan HM runs (Duty Finder was up for some stuff).
2. Error code 90,000, exits to main menu.
3. Error code 5003 at main menu.
4. Client exits normally, unlike some other people with this issue.
5. Log back in normally.

Windows 7, up to date drivers, etc. if it helps. Edit: Also in case it helps, auto renewal was turned off before logging on today, 2 days left on account (server non-transfer related).