(more) strange iwtrace.log messages

System

TeamSIte 5.5.2SP2a on W2KSP2. Seeing weird messages in iwtrace.log:

Argument "" isn't numeric in eq at c:\iw-home\iw-perl\site\5.00503\lib/TeamSite/WFtask.pm line 1147.
Use of uninitialized value at c:\iw-home\iw-perl\site\5.00503\lib/TeamSite/Uniscape/uniscape.pm line 117.
Use of uninitialized value at c:\iw-home\iw-perl\site\5.00503\lib/TeamSite/WFtask.pm line 681.
Use of uninitialized value at c:\iw-home\iw-perl\site\5.00503\lib/TeamSite/Uniscape/uniscape.pm line 117.
Use of uninitialized value at c:\iw-home\iw-perl\site\5.00503\lib/TeamSite/WFtask.pm line 1088.

None of the custom code uses these packages. Anybody else have these? Is it a bug or just sloppy Perl? Is this fixed in SP2b?