I have just started to experience a very strange problem that
hopefully someone may recognise.

Note that this only happening on my machine and the code runs
perfectly well on other machines . The problem has only come to light
since our support desk made a change to my Windows profile. The
problem may be caused by this change but I am hoping expert Excel
resources may be able to help explain the problem.

I have code to populate worksheets with data, within which I check for
pagebreaks and add lines and text to get around natural constraints
that Excel has for page headers. However, when I run the following
line (even if this returns False) Excel changes the column widths of
columns to a large random value (usually 255 pts)

If Worksheets(strsheetname).Rows(introw).PageBreak < xlNone Then

In have stepped through the code and actually can see the worksheet
format change as this line is processed.

Thanks for any feedback.