If you open up your xxxx.lst file, you can see where your assembler thinks the ram start and end locations are. For some reason, this sounds buggered. It also will show which MPASM version you are using, and which processor includes you are using.

Here's what mine looked like. You can compare it to yours and see if there are differences in RAM locations.
Code:
MPASM  5.38                      UNTITLED.ASM   1-21-2011  10:05:20         PAGE  1


LOC  OBJECT CODE     LINE SOURCE TEXT
  VALUE

                      00001 
                      00002 ; PICBASIC PRO(TM) Compiler 2.60LA, (c) 1998, 2009 microEngineering Labs, Inc. All Rights Reserved. 
  00000001            00003 _USED                   EQU     1
                      00004 
                      00005         INCLUDE "C:\PBP\18F8527.INC"
                      00001 ;****************************************************************
                      00002 ;*  18F8527.INC                                                 *
                      00003 ;*                                                              *
                      00004 ;*  By        : Leonard Zerman, Jeff Schmoyer                   *
                      00005 ;*  Notice    : Copyright (c) 2008 microEngineering Labs, Inc.  *
                      00006 ;*              All Rights Reserved                             *
                      00007 ;*  Date      : 09/15/08                                        *
                      00008 ;*  Version   : 2.60                                            *
                      00009 ;*  Notes     :                                                 *
                      00010 ;****************************************************************
                      00017         LIST
                      00018         LIST p = 18F8527, r = dec, w = -311, w = -230, f = inhx32
                      00019         INCLUDE "P18F8527.INC"  ; MPASM  Header
                      00001         LIST
                      00002 
                      00003 ;==========================================================================
                      00004 ;  MPASM PIC18F8527 processor include
                      00005 ; 
                      00006 ;  (c) Copyright 1999-2010 Microchip Technology, All rights reserved
                      00007 ;==========================================================================
                      00008 
                      02400         LIST
300000 32FF           00020         __CONFIG    _CONFIG1H, _OSC_HS_1H & _FCMEN_OFF_1H & _IESO_OFF_1H
300002 F31F           00021         __CONFIG    _CONFIG2H, _WDT_ON_2H & _WDTPS_512_2H
300006 FF8B           00022         __CONFIG    _CONFIG4L, _STVREN_ON_4L & _LVP_OFF_4L & _BBSIZ_BB2K_4L & _XINST_OFF_4L
                      00025         LIST
  00F00000            00026 EEPROM_START    EQU     0F00000h
  00000040            00027 BLOCK_SIZE      EQU     64
                      00006 
  00000000            00007 RAM_START                       EQU     00000h
  00000F5F            00008 RAM_END                         EQU     00F5Fh
  00000010            00009 RAM_BANKS                       EQU     00010h
  00000060            00010 BANK0_START                     EQU     00060h
  000000FF            00011 BANK0_END                       EQU     000FFh
  00000100            00012 BANK1_START                     EQU     00100h
  000001FF            00013 BANK1_END                       EQU     001FFh
  00000200            00014 BANK2_START                     EQU     00200h
  000002FF            00015 BANK2_END                       EQU     002FFh
  00000300            00016 BANK3_START                     EQU     00300h
  000003FF            00017 BANK3_END                       EQU     003FFh
  00000400            00018 BANK4_START                     EQU     00400h
  000004FF            00019 BANK4_END                       EQU     004FFh
  00000500            00020 BANK5_START                     EQU     00500h
  000005FF            00021 BANK5_END                       EQU     005FFh
  00000600            00022 BANK6_START                     EQU     00600h
  000006FF            00023 BANK6_END                       EQU     006FFh
  00000700            00024 BANK7_START                     EQU     00700h
  000007FF            00025 BANK7_END                       EQU     007FFh
MPASM  5.38                      UNTITLED.ASM   1-21-2011  10:05:20         PAGE  2


LOC  OBJECT CODE     LINE SOURCE TEXT
  VALUE

  00000800            00026 BANK8_START                     EQU     00800h
  000008FF            00027 BANK8_END                       EQU     008FFh
  00000900            00028 BANK9_START                     EQU     00900h
  000009FF            00029 BANK9_END                       EQU     009FFh
  00000A00            00030 BANK10_START                    EQU     00A00h
  00000AFF            00031 BANK10_END                      EQU     00AFFh
  00000B00            00032 BANK11_START                    EQU     00B00h
  00000BFF            00033 BANK11_END                      EQU     00BFFh
  00000C00            00034 BANK12_START                    EQU     00C00h
  00000CFF            00035 BANK12_END                      EQU     00CFFh
  00000D00            00036 BANK13_START                    EQU     00D00h
  00000DFF            00037 BANK13_END                      EQU     00DFFh
  00000E00            00038 BANK14_START                    EQU     00E00h
  00000EFF            00039 BANK14_END                      EQU     00EFFh
  00000F00            00040 BANK15_START                    EQU     00F00h
  00000F5F            00041 BANK15_END                      EQU     00F5Fh
  00000000            00042 BANKA_START                     EQU     00000h
  0000005F            00043 BANKA_END                       EQU     0005Fh