Afaik, the ex BY webspace allows 'some' scripts to be run, whereas the ex NTL webspace does not allow any server side stuff, at all. So frontpage extensions, for example, will not work.
- now this is pure speculation, but is it possible that VM are in the process of 'upgrading' the webspace servers, so that they all behave as the ex NTL ones do???
If that is incorrect, I apologise, it isn't my intention to spread unfounded rumours, just a guess