Hi,

I'm running Excel 2007, in Compatibility Mode, on a Windows XP machine with
dual monitors.

Often, when I have more than one workbook open, or multiple copies of Excel
running, some or all of the Excel icons disappear from the Windows task bar.
Alt-Tab still shows them, but not the taskbar. As time passes, the Excel
icons will randomly appear and disappear from the taskbar.

I don't know if they are related, but another problem I'm having is that
Excel does not seem to know which workbook is active when I have more than
one open. For example, I can have workbooks 1.xls, 2.xls, and 3.xls open. I
can select 2.xls and click the 'X' to close it. Excel will ask if I want to
save changes, and then it may close workbook 1.xls and leave 2.xls open.

All of the workbooks I use contain VBA modules, if that makes any
difference. I also have the 'Show all windows in the Taskbar' option checked
under Excel Options. Has anyone else experienced either of these problems?
Thanks in advance for your help!