Seems immirgation changed its message about being opening during the extra holiday. They are still open, but now only for emergencies.

http://bangkok.immigration.go.th/intro1.html

According to Official holiday issued by The Government during 27-31 October, 2011.

Immigration Division 1 will be serviced by some officer avialable only for necessary emergency cases.

on Thursday 27 , Friday 28 and Monday31 October,2011 time 08.30-16.30 hrs. at the Government Complex ,

Chamchuri Squre Building and Soi SuanPlu Office

(SuanPlu Office services only for legalized special Labor of three Nationalities Laos, Cambodia and Myanmar residing in Bangkok)

And on Saturday 29 October, 2011 time 8.30 - 12.00 hrs. will be opened at Soi SuanPlu

(services only for visa extension of Tourist visa , transit visa , without visa , visa on arrival and Re-entry Permit.)

For more details call 1111

Don't forget this article in The Nation:

Migrant workers can seek visa extension in nonflooded areas

See: http://www.thaivisa....ost__p__4798195