I'm using IMP, horde, Postgresql, and php3 (default versions for Debian 2.2). When I try to send an 
email php  crashes. This is the transcript from gdb

arda:/var/log# gdb /usr/sbin/apache-ssl
GNU gdb 19990928
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This GDB was configured as "i686-pc-linux-gnu"...
(no debugging symbols found)...
(gdb) run -X -f /etc/apache-ssl/httpd.conf
Starting program: /usr/sbin/apache-ssl -X -f /etc/apache-ssl/httpd.conf
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Reading key for server varda.saic.com:443
Launching... /usr/lib/apache-ssl/gcache
pid=10177
Launching... /usr/lib/apache-ssl/gcache
pid=10178
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Program received signal SIGSEGV, Segmentation fault.
0x402fa55a in php3_mime_split () from /usr/lib/apache/1.3/libphp3.so
(gdb) bt
#0  0x402fa55a in php3_mime_split () from /usr/lib/apache/1.3/libphp3.so
#1  0x402fc887 in _php3_getlastmod () from /usr/lib/apache/1.3/libphp3.so
#2  0x402fce8f in php3_treat_data () from /usr/lib/apache/1.3/libphp3.so
#3  0x402d6266 in _php3_hash_environment () from /usr/lib/apache/1.3/libphp3.s
o
#4  0x40324908 in lex_scan () from /usr/lib/apache/1.3/libphp3.so
#5  0x402dbfe9 in read_next_token () from /usr/lib/apache/1.3/libphp3.so
#6  0x402d4cea in phplex () from /usr/lib/apache/1.3/libphp3.so
#7  0x403163c0 in phpparse () from /usr/lib/apache/1.3/libphp3.so
#8  0x402d671a in _php3_build_argv () from /usr/lib/apache/1.3/libphp3.so
#9  0x402d6a3e in apache_php3_module_main ()
   from /usr/lib/apache/1.3/libphp3.so
#10 0x402d37b6 in send_php3 () from /usr/lib/apache/1.3/libphp3.so
#11 0x402d385e in send_parsed_php3 () from /usr/lib/apache/1.3/libphp3.so
#12 0x8057204 in ap_invoke_handler () 
#13 0x8065a7c in ap_some_auth_required ()
#14 0x8065ad8 in ap_process_request () 
#15 0x805f877 in ap_child_terminate () 
#16 0x805fa0c in ap_child_terminate () 
#17 0x805fb29 in ap_child_terminate () 
#18 0x805ffdb in ap_child_terminate () 
#19 0x806068d in main ()
#20 0x40196a52 in __libc_start_main () from /lib/libc.so.6
(gdb)