I'm still struggling with Apache::Registry/CGI
One particular script calls another passing a list of parameters that the user selected. The second script (using the wonderful Spreadsheet::WriteExcel module) sends back a spreadsheet to the users browser. This works fine. In fact better than we'd hoped.
However, there is one annoying problem. If you press 'Back' and then re-run every 'n' number of times the parameters seem to get lost. For example the code snippet 
        for ($q->param(-name=> 'Country')) {
             $redr .= "&COUNTRY=$all_countries{$_}";
        }

[download]
Normally correctly generates something like the following

country_report.pl?COUNTRY=AF&COUNTRY=UAJ&COUNTRY=AL&COU NTRY=DZ&COUNTRY=AD
But sometimes this appears

country_report.pl?COUNTRY=&COUNTRY=&COUNTRY=&COUNTRY =&COUNTRY=&COUNTRY=&COUNTRY=&COUNTRY=

Before you ask use strict and warnings are on, The Apache error_log doesn't mention anything. The script saves and loads the current parameters in a file. By the way, I've pulled all my hair out. Any ideas gratefully received.

In reply to CGI dropping my params by Jonathan

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