Rule does not work after update

Hello,

scince I updated promcail to 3.22 (sorry don't know anymore which 
version I had before but it was an older one) theo following rule 
does not work anymore.

:0 fwh
* ^Subject:\/.*(\[(JI|KL|FLT|SMS)\]).*$
  {
    NEWSUBJECT="`/bin/echo $MATCH | /usr/bin/awk '{ gsub(/(\[(JI|KL|FLT|SMS)\] 
)/, \"\"); print; }'`"
    |/usr/bin/formail -i "Subject: $NEWSUBJECT"
  }


In the logs appears:
procmail: Match on "^Subject:\/.*(\[(SIT|TI|WI|IMI)\]).*$"
procmail: Extraneous filter-flag ignored
procmail: Extraneous deliver-head flag ignored
procmail: Executing "/bin/echo $MATCH | /usr/bin/awk '{ 
gsub(/(\[(SIT|IMI|TI|WI)\] )/, ""); print; }'"
procmail: Assigning "NEWSUBJECT=Re: Re: [FIM] CeBit @Martin Wolf"
procmail: Skipped "|/usr/bin/formail -i "Subject: $NEWSUBJECT""

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