Converting from vBulletin 4.02 to SMF 2.0rc3 problem

[w1z8it]

I'm aware that you don't have a converter for this yet for some reason, but I see other posts of posters using the latest version you have with vBulletin4 and having success, but I'm getting this:

Converting...
Converting posts (this may take some time)...
Successful.
Converting polls...Wrong value type sent to the database. Integer expected. (expire_time)

And then it stops, any ideas?