XP's search is full of new issues. This is just one.
Recently upgraded from W98 to WXP. In W98, to search on multiple drives, all that was required was to separate each drive by a comma or semicolon; eg. e:;f:
When using the same syntax with XP, it says e:;f: is not a valid folder even though the default is displayed as Local Hard Drives (C:;E:;F:;G: )