SharePoint (WSS 3.0) Edit Page link missing

Question

I have a page used to display our custom webparts that's always worked perfectly until deploying the solution via a custom site template on a new server.

• On one particular page in a site, the Edit Page button is not in the dropdown.

• The Personalize This Page link is present on the malfunctioning page.

• Any other page (and any new page created) in the same site has the *Edit page button and not the *Personalize link.

• Adding ?PageView=Shared to the URL has no effect.

• Adding ?PageView=Shared&ToolPaneView=2 allows editing in shared view from the tool pane, but I need the normal button to display for the page to work properly

• The malfunctioning page uses a custom master, but has always worked until this particular installation.

• The page is in the root of its site, same as the default page (which works). It is not in a document library, and is not under version control or checked out.

• I was able to get rid of the personalize button by setting AllowPersonalization=false on all the zones.

• There are customizable zones on the page.

Any suggestions for how I can cause this page to have the standard "Edit Page" button option in the Site Actions menu the rest of the site.