»In which the system is down

The fileserver behind this is having some issues.
In the meantime, consider that MUNI will be shutting down the Market St Subway later this month, in order to perform some maintenance:

Metro Subway Stations from Embarcadero to Church Street
To Close at 10 pm Monday-Friday for Metro Improvement Project
On Tuesday, January 17th, 2006, the Municipal Transportation Agency (MTA) will begin Phase I of the Metro Improvement Project. The Metro subway from the Embarcadero to the Church Street stations will close at 10:00 p.m. instead of 1:00 a.m. Monday-Friday for Phase I of the project. Also, there will be no N Judah rail service after 10:00 p.m. Monday-Friday between the Caltrain depot at 4th & King Sts. and Duboce Ave. & Church St. Bus shuttles will provide substitute service for the subway trains. The Castro Street, Forest Hill, and West Portal subway stations will remain open until their usual closing time of 1 a.m. Monday-Friday during Phase I.
The Metro Improvement Project
The Metro Improvement Project will replace the overhead-wire system that provides power for the Metro cars in the subway. Phase I will take approximately one year and includes the stations from Embarcadero to Church Street. Phase II, which will start in the winter of 2007, will replace the overhead-wire system between the Castro Street and West Portal stations. Combined, the two phases will take approximately two years. The replacement project is necessary because the overhead system in the subway is over 25 years old, and maintenance costs and service problems in the subway have been increasing because of the aging system.
Metro Service After 10:00 p.m. Monday-Friday During Phase I
After 10:00 p.m. Monday-Friday, K, L, and M Metro rail lines will only operate between their outer terminals and the Castro Street Station until the start of regular Metro Owl bus service at 1:00 a.m. J and N Metro rail lines will only operate between their outer terminals and Church & Market Sts. until the start of Metro Owl bus service. Shuttle bus service will be provided between 4th & King Sts. and Castro & Market, along King St., The Embarcadero, and Market St., until the start of regular Metro Owl bus service. The buses will stop at designated stops along the route. Passengers will be able to transfer to and from the J and N Metro rail lines at Church & Market, and to and from the K, L, and M Metro rail lines at the Castro Street Station.
Saturday-Sunday Metro Service
Saturday and Sunday evening Metro rail service will not be affected, and all the stations in the subway will close at their usual time of 1:00 a.m. However, Saturday morning Metro rail service will start at 7:00 a.m. instead of 6:00 a.m. for the duration of the project, and Metro Owl bus service will be extended to 7:00 a.m. on Saturdays.
Ballpark Service
Metro rail ballpark service on the K and N lines will be provided on baseball game days. However, no rail service from the subway to the ballpark will be available after 9:30 p.m. Monday-Friday. For games that end after that time, K and N rail service from the ballpark will only be provided by the Metro cars that have been banked to the west of the Caltrain depot. After those cars have picked up passengers at the ballpark, service from the ballpark will be provided by the shuttle buses as outlined above, as well as by the regularly scheduled 15 Third Street, 30 Stockton, 45 Union-Stockton, and 47 Van Ness bus lines that serve the ballpark area.
Accessibility
Transfers between the shuttle buses and rail service will be provided for wheelchair users and others needing to use the accessible wayside platforms for the J and N Metro rail lines. The transfers will take place at the Duboce Ave. & Church St. stop for both inbound and outbound J-line service, as well as for inbound N-line service, and at the Duboce Ave. & Noe St. (Duboce Park) stop for outbound N-line service.

For more information on Muni service, please call Muni's Telephone Information Center at 415/673-MUNI (673-6864), or visit Muni's Web site at www.sfmuni.com. For information on Muni's Accessible Services Program, please call 415/923-6142 (TTY 351-3443).