Hm, I don't have the problem on Solaris either... Tried it with

SunOS solaris8 5.8 Generic_117350-20 sun4u sparc SUNW,Sun-Blade-2500
SunOS solaris10 5.10 Generic sun4u sparc SUNW,Sun-Blade-2500
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and Perl versions 5.8.8 ("ActivePerl"), 5.8.4 (self-built), and on Solaris 8 even with 5.005_03 (system-supplied). No problems...   Weird.