In PHP 4.0.4pl1 form input started to behave strange. The problem is simular to Bug 8940 but also includes other problems.

It seems that it affects every form with encryptiontype set to "multipart/form-data".

Besides that the mimetype is bundled with the uploaded file (as explained in bug report 8940) every other field is affected.

Data from every other field in the form starts with a linebreak char, except for formobjects of type textarea. Textarea form fields starts with double linebreak chars.

Forms where a encryptiontype is unset are not affected.

It also looks like some kind of files (like tgz-compressed files) are affected otherwise, but I still don't know what the difference is or if there are any other file types that are affected simular to tgz-compressed files.