hi bmarkus,
when i tce-load -i thunderbird as my first program, then this problem still exists, .
if i load icecat before thunderbird, then i have no problems at all with thunderbird 13.0
that means that icecat provides what thunderbird 13.0 is still missing.
i provide you the messages, when thunderbird cannot start:
tc@box:~$ thunderbird
XPCOMGlueLoad error for file /tmp/tcloop/thunderbird/usr/local/thunderbird/libxpcom.so:
libxul.so: cannot open shared object file: No such file or directory
Couldn't load XPCOM.
then i load icecat and thunderbird starts without problems and these messages:
tc@box:~$ thunderbird
Error: No such tab mode: chat
-- Exception object --
+ fileName (string) 'chrome://messenger/content/tabmail.xml'
+ lineNumber (number) 465
*
-- Stack Trace --
openTab("chat",[object Object])@chrome://messenger/content/tabmail.xml:465
get_selected()@chrome://messenger/content/chat/imconv.xml:121
()@chrome://global/content/bindings/richlistbox.xml:576
tc@box:~$