<p>I installed VS SP1 and played around with Entity Framework.</p>

<p>I created a schema from an existing database and tried some basic operations.</p>

<p>Most of it went well, except the database schema update.</p>

<p>I changed the database in every basic way:</p>

<ul>
<li>added a new table</li>
<li>deleted a table</li>
<li>added a new column to an existing table</li>
<li>deleted a column from an existing table</li>
<li>changed the type of an existing column</li>
</ul>

<p>The first three went well, but the type change and the column deletion did not followed the database changes.</p>

<p>Is there any way to make is work from the designer? Or is it not supported at the moment? I didn't find any related material yet, but still searching.</p>

I would guess that possibly those don't happen because they would break the build for existing code, but that's just a guess on my part.
Here's my logic:
First, EF is supposed to be more than 1:1 table mapping, so it's quite possible that just because you are deleting a column from table A doesn't mean that for that entity, there shouldn't be a property Description. You might just map that property to another table.
Second, changing a type could just break builds. that's the only rationale there.