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yes, that's a known output, what the 'problem' is, is that i used a modified version of xoops' common.php, with the debug controls removed. so the script is displaying debug information even if debug is disabled.
also, the reason for the notices, is that the script is being run without the variables being filled (variables that are filled when paypal contacts the ipn script), so the script displays those 'notices', which in turn cause errors
i apologize for the messy output. i've been wanting to get back to work on the Donations module for awhile now, but i've recently encountered some tight $$ problems, which caused me to drop my 2 dedicated webservers, and i'm still adjusting to my new shared hosting environment, lol...
i'm also in the process of relaunching a website, in addition to launching 6 more over the course of the next month, so i've been a bit busy.
hopefully i'll be able to get back into coding before long, but in the meantime, you might want to check out the most current release at
http://dev.xoops.org (the packaged CVS export), it had some nice enhancements made to it, along with some good bugfixes. (if you're not already using that release, i mean)