From what I know, it's something we have to live with.
Or maybe you can use JQuery to do some trick.

Change a column width  using jQuery:

View Source to see the name of the table that contains your target column's
name. In this case my list  has a "Category" column. The table that holds the
column header that I want to alter looks like the following:

<table style="width: 100%;" sortable="" sortdisable="" filterdisable=""
filterable="" name="Category" ctxnum="1" displayname="Category"
fieldtype="Lookup" resulttype=""
sortfields="SortField=Category&SortDir=Asc&View=%7b864B3C2A%2dDF2B%2d4D2\
9%2d9B31%2d9B5191754A80%7d" height="100%" cellspacing="1" cellpadding="0"
class="ms-unselectedtitle" onmouseover="OnMouseOverFilter(this)">

See the name property? It's "Category"

If I created a column  called "Category Column" instead of "Category" it would
show: name="Category _x0020_Column"

From whatever view you want to implement this on (e.g. AllItems.aspx) select
'Site Actions' --> Edit Page. Add a Content Editor Web Part (CEWP) and add the
following to the Source Editor:

<script type="text/javascript"
src="ajax.googleapis.com/.../jquery.min.js"></script>
<script type="text/javascript">
$(function(){

$("table[name=Category]").css("width","300px");

});
</script>

Select Ok.

The columns width should now show 300px wide.

Remember that jQuery (indeed, all JavaScript) is case sensitive. I could not use
name=category or name=category _x0020_column. It will fail gracefully.

It didnt work, I don't know where I made mistake. Please can you help me?

I have a list  called "Systems List" (example), and some example columns. The
name of column  that I want change  width is "Columns1".

I opened the "Systems List", and I chose "Site Actions", and "Edit page". I
added "Content Editor Web Part" above "Systems List web part", and added the
code bellow inside code editor, and I had applyed, but it didnt work. Where did
I make mistake?

<script type="text/javascript"
src="ajax.googleapis.com/.../jquery.min.js"></script>
<script type="text/javascript">
$(function() {
$("table[name=Colunas2").css("width","300px");
});
</script>

This is my line:
$("table[name= Category] ").css("width" ,"300px") ;

This is your line:
$("table[name=Colunas2").css("width","300px");

If your column  name is Columns1 then you should have:
$("table[name=Columns1").css("width","300px"); (Check your HTML source for the
correct column name...does your source show Colunas2 for Columns1?)

But you also need to make sure that you close your property selector correctly.
You missed a "]":
$("table[name=Columns1]").css("width","300px");

Unfortunately It did not work. Any pointers pleeeeeease....! I have WSS 3.0

This is what I have in my HTML source..

<TH nowrap scope="col" class="ms-vh2"><div style="width:100%;position:relative;left:0;top:0;"><TABLE style="width:100%;" Sortable="" SortDisable="" FilterDisable="" Filterable="" Name="Title" CtxNum="1" DisplayName="Title" FieldType="Text" ResultType="" 

<script type="text/javascript"
src="http://ajax.googleapis.com/ajax/libs/jquery/1.3/jquery.min.js"></script>
<script type="text/javascript">
$(function(){
$("table[name=Title]").css("width","50px");
});
</script>