[Zope] Base 64 passed into Zope

[Jonathan Cleaver]

I have a system which is accepting Base 64 encoded data from an external 
source, due to the protocol being used at the other end this is being 
passed in through a URL variable.

e.g. http://foo.bar.com?Data=uiDggGREJJytIIUicSSAa+WEhnGK

I am having an issue (Using Zope 2.7.6, Python 2.3.5) where the + and / 
characters in the incoming data are being replaced with spaces. 
Unfortunately, since both + and / are being replaced with the same 
character, it is not simply a matter of doing a find and replace on the 
string to restore these characters.

This system did work fine for a long while. I upgraded the machine's 
Python from 2.3.5 to 2.4.1 a couple of months ago and have now reverted 
back to 2.3.5.

Has anyone encountered a similar problem before and how can I work 
around/through it?

Kindest regards

Jonathan Cleaver