The same here on Ubuntu 11.10 (mspdebug and msp430-gdb from distribution package repository)
$ sudo mspdebug rf2500 "gdb"
MSPDebug version 0.16 - debugging tool for MSP430 MCUs
[...]
Bound to port 2000. Now waiting for connection...
Client connected from 127.0.0.1:40729
Clearing all breakpoints...
-----
$ gdb msp430-gdb
[...]
GNU gdb (Linaro GDB) 7.3
[...]
(gdb) target remote localhost:2000
Remote debugging using localhost:2000
Program received signal SIGSEGV, Segmentation fault.
0x00000000 in ?? ()
(gdb) bt
#0 0x00000000 in ?? ()
#1 0x08062bce in ?? ()
#2 0x0805f807 in ?? ()
#3 0x081237aa in ?? ()
#4 0x0812422c in ?? ()
#5 0x0812a12f in ?? ()
#6 0x08123503 in ?? ()
#7 0x08118c00 in ?? ()
#8 0x0807ac91 in ?? ()
#9 0x08129ef5 in ?? ()
#10 0x0806ff40 in ?? ()
#11 0x080564eb in ?? ()
#12 0x08130009 in ?? ()
#13 0x08130a83 in ?? ()
#14 0x0820c8cc in ?? ()
#15 0x08130078 in ?? ()
#16 0x0812f19b in ?? ()
#17 0x0812f31b in ?? ()
#18 0x0812f775 in ?? ()
#19 0x0812a12f in ?? ()
#20 0x080a957c in ?? ()
#21 0x0812a713 in ?? ()
#22 0x0804d4a8 in ?? ()
#23 0x0812a12f in ?? ()
#24 0x0804e35c in ?? ()
#25 0x0812a12f in ?? ()
#26 0x0804e6e0 in ?? ()
#27 0x0804d343 in ?? ()
#28 0x001f4113 in __libc_start_main () from /lib/i386-linux-gnu/libc.so.6
#29 0x0804d369 in ?? ()
Backtrace stopped: Not enough registers or memory available to unwind further
(gdb)
The same here on Ubuntu 11.10 (mspdebug and msp430-gdb from distribution package repository)
$ sudo mspdebug rf2500 "gdb"
MSPDebug version 0.16 - debugging tool for MSP430 MCUs
[...]
Bound to port 2000. Now waiting for connection...
Client connected from 127.0.0.1:40729
Clearing all breakpoints...
-----
$ gdb msp430-gdb
[...]
GNU gdb (Linaro GDB) 7.3
[...]
(gdb) target remote localhost:2000
Remote debugging using localhost:2000
Program received signal SIGSEGV, Segmentation fault. linux-gnu/ libc.so. 6
0x00000000 in ?? ()
(gdb) bt
#0 0x00000000 in ?? ()
#1 0x08062bce in ?? ()
#2 0x0805f807 in ?? ()
#3 0x081237aa in ?? ()
#4 0x0812422c in ?? ()
#5 0x0812a12f in ?? ()
#6 0x08123503 in ?? ()
#7 0x08118c00 in ?? ()
#8 0x0807ac91 in ?? ()
#9 0x08129ef5 in ?? ()
#10 0x0806ff40 in ?? ()
#11 0x080564eb in ?? ()
#12 0x08130009 in ?? ()
#13 0x08130a83 in ?? ()
#14 0x0820c8cc in ?? ()
#15 0x08130078 in ?? ()
#16 0x0812f19b in ?? ()
#17 0x0812f31b in ?? ()
#18 0x0812f775 in ?? ()
#19 0x0812a12f in ?? ()
#20 0x080a957c in ?? ()
#21 0x0812a713 in ?? ()
#22 0x0804d4a8 in ?? ()
#23 0x0812a12f in ?? ()
#24 0x0804e35c in ?? ()
#25 0x0812a12f in ?? ()
#26 0x0804e6e0 in ?? ()
#27 0x0804d343 in ?? ()
#28 0x001f4113 in __libc_start_main () from /lib/i386-
#29 0x0804d369 in ?? ()
Backtrace stopped: Not enough registers or memory available to unwind further
(gdb)