Under some circumstances the menu item for the front page of my site http://www.ablalenguas.com/ forgets that it has children and doesn’t display them.

I’m using primary links as the source of secondary links so normally when I click on the homepage link (Abla Lenguas) it displays the secondary links in the left column.  However if I perform certain issues, e.g. edit another page, then go back to the homepage, there are no secondary links displayed.

It seems to be a caching issue because the problem is always (temporarily) resolved if I click “save” on the admin page where you change the theme.  Also, sometimes when I clear the cache the problem is resolved.  Anyone have any idea about this?  It’s not theme-specific as it happened on Garland and my current theme.

Fletch