Okay took awhile to sink in. You have all the sheet tabs selected.
Danger severe tire damage warning.

With all of the sheet tabs selected any change made to one sheet
will be made to all selected sheets.

To ungroup sheets right click on any worksheet tab and then
choose "Ungroup Sheets".

You may have already damaged your file, exit out of Excel without saving
or Save As a different name. You may have to restore your file from
a backup so check things carefully to assess the damage.

I knew it couldn't be colored tabs because they did not exist before Excel 2002.

Used with care, grouping sheet tabs is a very powerful tool,
to group some sheets, select using the mouse and Ctrl key,
or right click on sheet tab to select all sheet tabs. This power
can also rapidly destroy your workbook.
---
HTH,
David McRitchie, Microsoft MVP - Excel [site changed Nov. 2001]
My Excel Pages: http://www.mvps.org/dmcritchie/excel/excel.htm
Search Page: http://www.mvps.org/dmcritchie/excel/search.htm

"Sheila D" wrote in message ...
In XP you can change the sheet tab colour so I guess someone has changed them
all to White! Right click on the sheet tab and choose tab colour to change to
a colour of your choice. HTH

Sheila

"JudithJubilee" wrote:

Hello there,

I have upgraded to Excel XP and all my sheet tabs appear white at the bottom
whether they are linked or not. Could someone help me please??

Julie