One of our users tried installing lightning 0.3.1 in thunderbird 1.5.0.10 
on our SL3 systems and it apperently installs ok but then won't let 
thunderbird start up properly.  On SL4 systems (using the same profile) it 
works ok.

  SL4 system has:  thunderbird-1.5.0.10-0.1.el4
  SL3 system has:  thunderbird-1.5.0.10-0.1.SL3

The lightning installed was the one from 
https://addons.mozilla.org/en-US/thunderbird/downloads/file/8814/lightning-0.3.1-tb-linux.xpi

Starting with thunderbird -g (to run under a debugger), gives me:

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 1073855744 (LWP 31316)]
0x003ccc74 in nsACString_internal::~nsACString_internal$base () from
/usr/lib/thunderbird-1.5.0.10/libxpcom_core.so

entering 'where', shows that it is crashing while trying to do something
with timezones...

(gdb) where
#0  0x003ccc74 in nsACString_internal::~nsACString_internal$base () from
/usr/lib/thunderbird-1.5.0.10/libxpcom_core.so
#1  0x05586b1e in calICSService::GetTimezoneIds (this=0x9092400,
aTzids=0xbfff8ac4) at ../../../dist/include/string/nsTDependentSubstring.h:62
...

so it seems to be unhappy with the timezone info in a way which cases a 
segv, but this doesn't happen on SL4 systems.

Does anyone else see this or is it something odd about our setup? 
sunbird/lightning has always had weirdness with timezones (I believe that 
it tries to do all the work itself which is just stupid on platforms with 
zoneinfo),

Apparently a binary of thunderbird downloaded from mozilla doesn't show 
this effect -- the user tells me, but he didn't say which version that was 
so it might not be directly comparable.

Of course TUV doesn't support thunderbird on EL3 so it might be something 
SL3 specifc that isn't as expected or just as easily it might be some 
problem in the way that *our* systems are set up (e.g. brokenness in 
timezones etc)...

Sadly the user didn't tell me if this just started happening or not!

   -- Jon