{mso-style-type:export-only;

After the last Thunderbird update 24.4.0, attachments no longer open. Attempt to open attachment flashes a message quickly but not long enough to read. I get the following errors in the error log with every attempt to open a document like word. [Exception... "Cannot call openModalWindow on a hidden window" nresult: ox80040111 (NS_ERROR_NOT_AVAILABLE)" location: "JS frame :: resource://gre/components/nsPrompter.js::openModalWindow::line 382" data: no] resource://gre/components/nsPrompter.js The second error is TypeError: this._taskbar is null resource://gre/modules/DownloadTaskbarProgress.jsm Under tools I have Word docs set to open with Microsoft Word. What are these errors and why can't I no longer open Word documents? In addition I also receive multiple warnings at the same time such as Unknown property 'mso-style-type'. Declaration dropped. {mso-style-type:export-only; Expected '{' to begin declaration block but found 'WordSection1'. @page WordSection1 DCar