Also need thunderbird-2.0.0.12-SECAlgorithmID.patch from

https://bugzilla.mozilla.org/show_bug.cgi?id=399589 to compile

thunderbird-2.0.0.12-SECAlgorithmID.patch

@@ -0,0 +1,61 @@
+---
+ security/manager/ssl/src/nsKeygenHandler.cpp |   19 +++++++++----------
+ 1 file changed, 9 insertions(+), 10 deletions(-)
+
+Index: mozilla/security/manager/ssl/src/nsKeygenHandler.cpp
+===================================================================
+--- mozilla.orig/security/manager/ssl/src/nsKeygenHandler.cpp	2005-07-20 21:31:22.000000000 +0200
++++ mozilla/security/manager/ssl/src/nsKeygenHandler.cpp	2008-02-02 00:08:05.000000000 +0100
+@@ -70,16 +70,25 @@
+ 
+ //All possible key size choices.
+ static SECKeySizeChoiceInfo SECKeySizeChoiceList[] = {
+     { nsnull, 2048 },
+     { nsnull, 1024 },
+     { nsnull, 0 }, 
+ };
+ 
++DERTemplate SECAlgorithmIDTemplate[] = {
++    { DER_SEQUENCE,
++	  0, NULL, sizeof(SECAlgorithmID) },
++    { DER_OBJECT_ID,
++	  offsetof(SECAlgorithmID,algorithm), },
++    { DER_OPTIONAL | DER_ANY,
++	  offsetof(SECAlgorithmID,parameters), },
++    { 0, }
++};
+ 
+ DERTemplate CERTSubjectPublicKeyInfoTemplate[] = {
+     { DER_SEQUENCE,
+           0, nsnull, sizeof(CERTSubjectPublicKeyInfo) },
+     { DER_INLINE,
+           offsetof(CERTSubjectPublicKeyInfo,algorithm),
+           SECAlgorithmIDTemplate, },
+     { DER_BIT_STRING,
+@@ -90,26 +99,16 @@
+ DERTemplate CERTPublicKeyAndChallengeTemplate[] =
+ {
+     { DER_SEQUENCE, 0, nsnull, sizeof(CERTPublicKeyAndChallenge) },
+     { DER_ANY, offsetof(CERTPublicKeyAndChallenge,spki), },
+     { DER_IA5_STRING, offsetof(CERTPublicKeyAndChallenge,challenge), },
+     { 0, }
+ };
+ 
+-DERTemplate SECAlgorithmIDTemplate[] = {
+-    { DER_SEQUENCE,
+-	  0, NULL, sizeof(SECAlgorithmID) },
+-    { DER_OBJECT_ID,
+-	  offsetof(SECAlgorithmID,algorithm), },
+-    { DER_OPTIONAL | DER_ANY,
+-	  offsetof(SECAlgorithmID,parameters), },
+-    { 0, }
+-};
+-
+ const SEC_ASN1Template SECKEY_PQGParamsTemplate[] = {
+     { SEC_ASN1_SEQUENCE, 0, NULL, sizeof(PQGParams) },
+     { SEC_ASN1_INTEGER, offsetof(PQGParams,prime) },
+     { SEC_ASN1_INTEGER, offsetof(PQGParams,subPrime) },
+     { SEC_ASN1_INTEGER, offsetof(PQGParams,base) },
+     { 0, }
+ };
+ 

thunderbird.spec

@@ -32,6 +32,7 @@ Source100:      find-external-requires
 Patch1:         firefox-2.0-link-layout.patch
 Patch2:         firefox-1.0-prdtoa.patch
 Patch3:         thunderbird-2.0.0.12-gcc43.patch
+Patch4:         thunderbird-2.0.0.12-SECAlgorithmID.patch
 
 Patch10:        thunderbird-0.7.3-psfonts.patch
 Patch11:        thunderbird-0.7.3-gnome-uriloader.patch
@@ -104,6 +105,7 @@ Mozilla Thunderbird is a standalone mail and newsgroup client.
 %patch1 -p1 -b .link-layout
 %patch2 -p0
 %patch3 -p0 -b .gcc43
+%patch4 -p1 -b .SECAlgorithmID
 
 %patch10 -p1 -b .psfonts
 %patch11 -p1 -b .gnome-uriloader