I've also tried doing it this way, but I get a similar issue.

    unless ($exp->expect(3,"Do you want to unpack these archive files 
+for processing? [Y/N]:")) {};
    print $exp "$response1\r";
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Output is similar, I've tried escaping the ? and brackets as well.

spawn id(3): list of patterns:
  #1: -ex `Do you want to unpack these archive files for processing? [
+Y/N]:'


spawn id(3): Does `'
match:
  pattern #1: -ex `Do you want to unpack these archive files for proce
+ssing? [Y/N]:'? No.

Waiting for new data (3 seconds)...
TIMEOUT
Returning from expect with TIMEOUT or EOF
Closing spawn id(3).
 at /usr/local/share/perl/5.14.2/Expect.pm line 1354
        Expect::soft_close('Expect=GLOB(0x96965bc)') called at ./Fullh
+ealthprep.pl line 37
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