hi,

Fault: the bootloader removes code spacing when loading the EEPROM, meaning that all data tables and C functions and ASM subroutines (as well as .ORG directives in A51) not immediately following the main routine are rendered useless.

Generally, you should not use absolute addressing for constant data placement. Anyway, if you need with it really (what I doubt at), then I see the easy way to fix the problem you indicated, with Keil ASM. The idea is simple: use macro which fills unused area with some value, for example:

;
; end of program code
;
; here is the macro:
	REPT	0x1000-$
	DB	0x00
	ENDM
; here is constant data at absolute address:
	ORG	0x1000
STRING:
	DB	'hello',0x00

	END

With such way the gap will be removed from output file and the problem gone out.
I do not know the name of such macro in assembler you use - look in its manual.

Regards,
Oleg