As of today, a Sunbird 1.0b1 installation on a computer stopped showing the calendar contents. The top right just shows a rotating loading indicator and nothing happens, all the directly calendar-related menus are disabled.
The error console shows the following messages:
rootComp is null file:///C:/Program%20Files%20(x86)/Mozilla%20Sunbird/modules/calUtils.jsm -> file:///C:/Program%20Files%20(x86)/Mozilla%20Sunbird/calendar-js/calIcsParser.js line 82 Error selecting events with recurrence! [Exception..."Unexpected error" nsresult: "0x8000ffff (NS_ERROR_UNEXPECTED)" location "JS frame :: file:///C:/Program%20Files%20(x86)/Mozilla%20Sunbird/modules/calUtils.jsm -> file:///C:/Program%20Files%20(x86)/Mozilla%20Sunbird/calendar-js/calStorageCalendar.js :: cSC_getEventFromRow :: line 1192" ata: no] DB Error: not an error line 237
The only change to the system that I can think of is that I tried updating Mozilla Firefox 29 to the current version (by opening the about box, waiting till the "downloading update" message was replaced with the notice to restart Firefox, though after restarting, it still seemed to be version 29) - does one Mozilla software such as Firefox mess around with files of another, such as Sunbird?
In any case, How can I fix Sunbird or at least find and retrieve the data in a useful format?
Concerning Sunbird: I am aware that Sunbird is not being actively developed any more, and when the decision was made to stop development on Sunbird in 2009, I had suggested to the owner of said computer to switch to another calendar software because updates were going to cease. Unfortunately, the user refused to do so, stating that the latest version of Sunbird published has everything they need (hence future updates were deemed unnecessary, if not harmful), and moreover, the most straightforward alternative, Lightning, was/is only available as a Thunderbird plugin, and the user in question definitely did not want to migrate away from Windows Live Mail.
P.S.: Unfortunately, there is no Sunbird tag, and my reputation is not sufficient to create one. The Lightning project should be the closest thing, so I have still added that tag.