[Forum] Upgrade from 4.0 to 4.2 and threads not displaying

[LeeRMR]

Hello

I've recently migrated to a much larger server.
SQL dump and import, images and attachments etc all migrated over and so far so good.

I can navigate through different forums but when I click on a thread - I get a white screen, no errors at all.

I've restored all the standard templates etc and that's made no difference. Anything else I can test at all?

It would appear I can create a new thread, but cannot view it. It displays in the forum as unread? HELP!

thanks

[Amaury]

Are you using a custom style or the default vBulletin 4 style?

[LeeRMR]

I've reverted custom styles back to standard.

Also tried the basic Mobile style too...
I'll download the basic style and try that now.

- - - Updated - - -

I've generated a new basic style, nothing.
Replaced showthread.php - still the same.

Could this be a mod re-write issue? We are running vbSEO?

- - - Updated - - -

Anyone?