[50 character or so descriptive subject here (for reference)]

[Jon Fairbairn,,,+44 1223 570179]

Configuration Information [Automatically generated, do not change]:
Machine: i386
OS: linux-gnu
Compiler: gcc
Compilation CFLAGS:  -DPROGRAM='bash' -DCONF_HOSTTYPE='i386' 
-DCONF_OSTYPE='linux-gnu' -DCONF_MACHTYPE='i386-redhat-linux-gnu' 
-DCONF_VENDOR='redhat' -DSHELL -DHAVE_CONFIG_H  -D_GNU_SOURCE 
-D_FILE_OFFSET_BITS=64  -I.  -I. -I./include -I./lib -I/usr/include -O2 
-march=i386 -mcpu=i686
uname output: Linux pictogramme.al.cl.cam.ac.uk 2.4.2-2 #1 Sun Apr 8 18:47:21 
EDT 2001 i586 unknown
Machine Type: i386-redhat-linux-gnu

Bash Version: 2.04
Patch Level: 21
Release Status: release

Description:
        [Detailed description of the problem, suggestion, or complaint.]

ulimit -s doesn't allow increases. Not even back to what it was before:

   18:02:52 pictogramme: ulimit -s
   4096
   18:02:56 pictogramme: ulimit -s 3000
   18:04:48 pictogramme: ulimit -s 4096
   bash: ulimit: cannot modify limit: Operation not permitted


Repeat-By:
        [Describe the sequence of events that causes the problem
        to occur.]

as above