gdb stopped working in 2.5.10 - works fine in 2.4.x

[Jurriaan on Alpha <thunder7@xs4all.nl>]

ALPHA :gdb ./angband
GNU gdb 5.1.1
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This GDB was configured as "alpha-linux"...
(gdb) run
Starting program: /usr/local/games/angband-2.9.7-alpha1/./angband
warning: Cannot insert breakpoint -2:
Cannot access memory at address 0xcc1088a823d9d62c
(gdb) q
The program is running.  Exit anyway? (y or n) y
ALPHA :

the breakpoint with a negative number, followed by the message 'Cannot
access memory at ...' happens on any executable I try with gdb.

This didn't happen with the 2.4.x kernels, so I suspect something in
2.5.x. Any ideas?

Thanks,
Jurriaan
-- 
After penetrating your skull the decibel storm of raucous riffs and
blistering glissandos starts rearranging the synapses in your brain.
You have arrived on the territory of Tribe Apocalyptica.
	Apocalyptica, liner notes to 'Cult'
GNU/Linux 2.5.10 on Debian/Alpha 990 bogomips load:0.15 0.53 0.66