Cydia not working after Spirit JB

[anon(4675100)]

OK,

I've upgraded from 3.1.2 to 3.1.3 and I jailbroke the 3G with Spirit. It worked a treat. Cydia was installed in seconds. However, cydia won't open. It hasn't opened at all since the JB. I did a restore and re-jailbroke it and cydia still won't start. You click the icon and it crashes immediately. So my question is - is there a way around cydia?

Thanks in advance!

davidjp