It had nothing to do with the kernel... I have same problem with the original one. Obexd loading ends to "Jul 29 21:07:34 Nokia-N900 obexd[1606]: src/plugin.c:add_plugin() Plugin ftp loaded" message.

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Sorry I sent message too hasty... the reason why obexd did't start was enhanced kernel. I uninstalled it and now obexd starts. My mistake... sorry.
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