Last modified: 2007-06-08 00:44:25 UTC
I "created" the category "Wikimedia CH" by inserting an article into it. Afterwards I went to the category-page to write a little description of the category. When opening the edit-page, there was the usual "This page doesn't exist yet"-text and afterwards in red and bold/italics: "Sorry! We could not process your edit due to a loss of session data. Because this wiki has raw HTML enabled, the preview is hidden as a precaution against JavaScript attacks. If this is a legitimate edit attempt, please try again. If it still doesn't work, try logging out and logging back in." Below that was the normal edit box. When typing in a text and saving it, everything worked fine, when opening the edit page again afterwards, the warning has disappeared. This pattern can be seen at all non-created category pages on internal-wiki (try out http://internal.wikimedia.org/w/index.php?title=Category:foo&action=edit), but after a quick look, this bug seems not to exist when doing the same e.g. at enwp.
Have you set on your preferences 'Show preview on first edit' ?
I'm getting the almost the same error on new category pages only: "Sorry! We could not process your edit due to a loss of session data. Please try again. If it still doesn't work, try logging out and logging back in." I do not have 'Show preview on first edit' enabled but still get the error. I'm using 1.6.7.
Around 2300hrs Amsterdam time, I received this same error message: "Sorry! We could not process your edit due to a loss of session data. Please try again. If it still doesn't work, try logging out and logging back in." When i went one page back in my IE browser (latest version; updated today), I received another error page expired. I lost two hours of work... is this information cached anywhere, so i can retrieve what i cannot exactly remember?
This was fixed ages ago...
