I think the views are pretty much the same for rendering the grid, but I can say for sure that something hasn't changed.

One thing that I know has changed: MVC

Perhaps MVC does something differently?

Anyways, how do you initialize random? In a view for each control? The reason that I'm asking is that two different instances of Random will generate the same number (since they're using the same seed if you don't specify one manually).

For instance the following example:

@{
    <pre>@(new Random().Next(10, 10000000))</pre>
    <pre>@(new Random().Next(10, 10000000))</pre>
    <pre>@(new Random().Next(10, 10000000))</pre>
}

will result in something like (the same result all three times):

@{
    <pre>116133</pre>
    <pre>116133</pre>
    <pre>116133</pre>
}

If you can use the same instance of Random, you will continue to get new random values, instead of the same random value. An alternative could also be to use a GUID or something similar - eg:

@{

@("u" + Guid.NewGuid().ToString().Replace("-", ""))

@("u" + Guid.NewGuid().ToString().Replace("-", ""))

@("u" + Guid.NewGuid().ToString().Replace("-", ""))

will result in something like:

@{
    <pre>u89c73303ef234a9987b68e1488104fc5</pre>
    <pre>u86a7cd1df39146af976552077a10dd6b</pre>
    <pre>u1c9b071e0f4e44d0a6cf058be441c2cc</pre>
}