postgis error (glibc detected)

[Luis Trevi ño]

I've just installed postgresql 8.1.2 with postgis 1.1.0 and map server 4.4
which works fine with shape files but when I try to access a postgis layer
I get this error message: *** glibc detected *** double free or corruption
(!prev): 0X0821d380 ***

I can't figure out what´s wrong!!

I've defined the layer as follows:
LAYER
  NAME gis
  STATUS ON
  CONNECTION "user=XXX password=XXX dbname=XXX host=XXX.XXX.XXX.XX"
  CONNECTIONTYPE postgis
  DATA "posicion from loca"

  TYPE POINT

  CLASS
    COLOR 255 0 0
    SYMBOL 7
    SIZE 12
  END
END

Does anybody knows what is wrong?

Thanks,
Luis