I get a "run-time error-object cannot be found" (and AC crashes) every 3rd or 4th time I used the order section. I haven't found the order section particularly useful, so it hasn't stopped me from using version 5.
I am much more annoyed by the partial incompatibilty between Adobe Acrobat 9 (not Reader, full Acrobat) and AC as far as viewing PDFs in the imported items and sign off windows. About once every 10-15 times, trying to view a document will "freeze" AC or display a blank window instead of the PDF document. It simply doesn't happen on other office computers, using Adobe Acrobat 7 or any of the Adobe Reader apps. It happens to both computers using Acrobat 9.
I reported this on the board almost a year ago with version 4, and also a bug report. Adobe is likely not going change their product to improve compatibility with AC. So I hope its somewhere on the AC techs "to do" list.