I am running Zotero 2.02 and the latest version of Seasons updated last week.
I'm stumped on this one. Sometime last night the WYSIWYG disappeared from my Item Element fields. No WYSIWYG appears when "Use HTML" is checked. The markup has been saved, and I can still manually key in markup -- just no WYSIW&G. (see screenshot: http://screencast.com/t/JLMj6Jj49)
It had been fine yesterday afternoon; I noticed the change yesterday evening.
Initially, when I first noticed the change, the actual markup was being displayed on public Show Item pages. After testing deactivating plugins, Simple Vocabulary (the latest release) seemed to be causing the markup display. Keeping it inactive has returned my Show Item public views sans markup, and displays markup ONLY in the Item element fields in the admin interface -- but still no WYSIWYG.
I have all plugins temporarily disabled for now, in case one of those is interring with the WYSIWYG being displayed.
While I am capable of hard-coding the markup for each relevant Item element field, I would prefer to speed of a WYSIWYG.
NOTE: The WYSIWYG *is* still displaying and working in all theme configuration settings (such as Home Page Text and Footer Text); it is just missing from Item element fields.
The only code changes I made prior to this earlier in the afternoon was adding Google Analytics .js tracking to my footer and and ShareThis .js tracking to my header.
Site example at: http://www.colleengreene.com/bible-history/items/show/4