Hi, list.

In some situations, Gnus call `nnimap-demule' with nil, and cause an
error: "insert: Wrong type argument: stringp, nil". This makes
`gnus-summary-prev-article' stop working in the situations.

Anyway, I wrote a patch for this. Please find the patch below.

2008-12-12  Naohiro Aota  <nao.aota@gmail.com>

	* nnimap.el (nnimap-request-article-part): Call nnimap-demule with
	empty string, when data is nil.