apache tail reports: ob_end_clean(): failed to delete buffer zlib output compression

Reported by Lungo@Tanzania

Operating System:
 on clean install of Natty. Note, it does not appear in an upgrade of Maverick to Natty.

Getting this in apache_tail:
        Refered by : http://localhost/pmoralg-central/index.php/login
        I2CE: I2CE_Error->handleError (/var/lib/iHRIS/lib/4.0.18/I2CE/lib/I2CE.php:858)
              I2CE->handleError
              ob_end_clean (/var/lib/iHRIS/lib/4.0.18/I2CE/lib/I2CE_Dumper.php:67)
              I2CE_Dumper->prepForDump (/var/lib/iHRIS/lib/4.0.18/I2CE/lib/I2CE_Dumper.php:136)
              I2CE_Dumper->dumpContents (/var/lib/iHRIS/lib/4.0.18/I2CE/modules/Pages/modules/FileDump/I2CE_FileDump.php:217)
              I2CE_FileDump->dump (/var/lib/iHRIS/lib/4.0.18/I2CE/modules/Pages/modules/FileDump/I2CE_FileDump.php:150)
              I2CE_FileDump->display (/var/lib/iHRIS/lib/4.0.18/I2CE/modules/Pages/lib/I2CE_Wrangler.php:89)
              I2CE_Wrangler->wrangle (/var/lib/iHRIS/pmoralg/4.0/sites/central/pages/index.php:60)
        ob_end_clean(): failed to delete buffer zlib output compression
        Occured on line 67 of /var/lib/iHRIS/lib/4.0.18/I2CE/lib/I2CE_Dumper.php

Possible solution:
    http://www.mombu.com/php/php/t-output-buffering-and-zlib-compression-issue-3554315.html