Sharepoint 2010 - master page mods not taking effect

Here are the changes I made to a copy of a v4.master page to accomplish what you are after...

First, for the requirement to resize the Quick Launch area, add the following CSS before the closing </head> tag in your master page:

<style type="text/css">
/* Set the width of the Quick Launch */
BODY #s4-leftpanel {
	width:250px;
}
/* Compensate for the custom width on the Quick Launch */
.s4-ca {
	margin-left:250px;
}
</style>

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For the second requirement to hide the View All Content link except for Site Managers, you need to edit the master page in a couple of places.

Search for the following block, and make the change to the permission level as seen in line 9 of the following snippet. This will hide the like in the Site Actions menu.

<SharePoint:MenuItemTemplate runat="server" id="MenuItem_ViewAllSiteContents"
	Text="<%$Resources:wss,quiklnch_allcontent%>"
	Description="<%$Resources:wss,siteactions_allcontentdescription%>"
	ImageUrl="/_layouts/images/allcontent32.png"
	MenuGroupId="300"
	Sequence="302"
	UseShortId="true"
	ClientOnClickNavigateUrl="~site/_layouts/viewlsts.aspx"
	PermissionsString="ManageWeb"
	PermissionMode="Any" />

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Next, find the following block, and make the permission change as seen in line 4. This will hide the link in the Quick Launch for any 2007 site collection running in compatibility mode on 2010. (Doesn't impact pure 2010 sites.)

<SharePoint:UIVersionedContent UIVersion="3" runat="server">
	<ContentTemplate>
		<h3 class="ms-standardheader"><label class="ms-hidden"><SharePoint:EncodedLiteral runat="server" text="<%$Resources:wss,quiklnch_pagetitle%>" EncodeMethod="HtmlEncode"/></label>
		<Sharepoint:SPSecurityTrimmedControl runat="server" PermissionsString="ManageWeb">
			<div class="ms-quicklaunchheader"><SharePoint:SPLinkButton id="idNavLinkViewAll" runat="server" NavigateUrl="~site/_layouts/viewlsts.aspx" Text="<%$Resources:wss,quiklnch_allcontent%>" accesskey="<%$Resources:wss,quiklnch_allcontent_AK%>"/></div>
		</SharePoint:SPSecurityTrimmedControl>
		</h3>
	</ContentTemplate>
</SharePoint:UIVersionedContent>

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Finally, make the change for normal SharePoint 2010 sites, to remove the link from the Quick Launch. Note I added the SPSecurityTrimmedControl tag around the <li>. I did this to keep the list markup clean, rather than render an empty set of <li></li> tags for normal users.

<Sharepoint:SPSecurityTrimmedControl runat="server" PermissionsString="ManageWeb">
<li>
	<SharePoint:ClusteredSPLinkButton
		id="idNavLinkViewAllV4"
		runat="server"
		PermissionsString="ViewFormPages"
		NavigateUrl="~site/_layouts/viewlsts.aspx"
		ImageClass="s4-specialNavIcon"
		ImageUrl="/_layouts/images/fgimg.png"
		ImageWidth=16
		ImageHeight=16
		OffsetX=0
		OffsetY=0
		Text="<%$Resources:wss,quiklnch_allcontent_short%>"
		accesskey="<%$Resources:wss,quiklnch_allcontent_AK%>"/>
</li>
</Sharepoint:SPSecurityTrimmedControl>

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