How about by changing all pins to inputs before sleep?
Code:
<code><font color="#000000">SLP:
OPTION_REG.7=0
<font color="#000080"><i>'INTCON.0 = 0   'RBIF
'INTCON.3 = 1   'RBIE  
</i></font>INTCON.1 = 0
INTCON.4 = 1
TRISA = %11111111
TRISB = %11111111
TRISC = %11111111
<font color="#008000">@ SLEEP 
@ NOP
</font>TRISA = %00000000
TRISB = %00000001
TRISC = %00000000
<b>PAUSE </b>100
<b>HIGH </b>PORTB.2
<b>PAUSE </b>1000
<b>LOW </b>PORTB.2
<b>GOTO </b>MAIN</code>
Any effects?

BR,
-Gusse-