Custom Fields problem with 2.5rc2

While trying to Write a post, I do the following (in this order):

• type in Title (eg NAME OF POST)
• type Post
• write tags
• check categories
• add a (pre-existing – using the drop box) custom field entry (hitting “Add Custom Field” after entering the info)
• add a second (pre-existing) custom field entry (again, clicking “Add Custom Field afterwards)
• Publish

When I go to the “Manage Posts” page, I see the following:

(published) NAME OF POST
(published) Older post
(published) Previous post
(published) Post before that
…etc…
(unpublished) NAME OF POST
(unpublished) Draft created on DATE at TIME

Clicking on the name of the post to edit it reveals the following:

For NAME OF POST (the one that was published):
All the info entered appears, except the only custom field entry displayed is the last one entered

For NAME OF POST (the one that was unpublished):
All the info entered appears, with the exception of the category and custom fields entries.

For Draft created on DATE at TIME (unpublished):
NONE of the info appears (the title was changed to “Draft created on DATE at TIME”)….EXCEPT for the first custom field entry.

If I go back and edit NAME OF POST, it will accept additional custom fields with no problem.

At first, I thought I was doing something screwy (and I remain open to the possibility that may still be the case), but this seems like pretty odd behavior if it was just some setting I needed to adjust.

For what it’s worth…
I’m using Firefox 2.0.0.13 and Windows XP (Media Center Edition).
I don’t have similar problems while using WordPress 2.3.3

Any help would be MUCH appreciated.

Thanks!