I've just hit the same issue,and that is the workaround I've found which I also filed as a bug and I am awaiting a reply.

building an executable with Strawberry Perl is successful but when actually running it (after we have renamed the c:/strawberry to c:/strawberryX so it cannot find the dependencies from the path), fails with the following errors :

" Can't locate loadable object for module IO in @INC (@INC contains: C
+ODE(0xa1d31c
) C:\strawberry\perl\vendor\lib .) at C:/strawberry/perl/site/lib/PAR/
+Heavy.pm line 103</p>

Compilation failed in require at C:/strawberry/perl/lib/IO/Handle.pm l
+ine 266.
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I am on WinXP SP3 ,PAR 1.002,PAR::Packer 1.009, and have tried Strawberry Perl versions 5.12.3.0,5.10.1.5,5.10.1.1 and the problem persists in all of them

perl -V reveals something strange with the backslashes:

%ENV:
   PERL_JSON_BACKEND="JSON::XS"
   PERL_YAML_BACKEND="YAML"
 @INC:
   C:/strawberry/perl/lib
   C:/strawberry/perl/site/lib
   C:\strawberry\perl\vendor\lib
   .
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"C:\strawberry\perl\vendor\lib" is not consistent with the other entries

I've found id 52794 (https://rt.cpan.org/Public/Bug/Display.html?id=52794) which is related to the issue although it refers to version PAR::Packer 1.001

"if ($Config{_delim} eq '\\') { s{\\}{/}g for @inc }"   
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I also corrected Strawberry's @INC by prepending the path "C:/strawberry/perl/vendor/lib" by setting the PERL5LIB env variable, rebuilt it and everything works fine and even tried it in machines that have no Perl installation whatsoever

It looks like Strawberry has the path messed up and needs the correct one.

Furthemore "if ($Config{_delim} eq '\\') { s{\\}{/}g for @inc }" satisfies Heavy.pm

Try it out and let me know if it was successfull