User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:39.0) Gecko/20100101 Firefox/39.0 Build ID: 20150630154324 Steps to reproduce: having updated to Thunderbird 38.1.0 now found that the navigations arrows ether side of "Today" and the mini calender will not change the calender view from the period containing the current day. Actual results: No change in the time period seen, can move between Day/Week/Multiweek/Month but only around the current date. Expected results: To be able to view time periods not containing the current day
Do you have any messages in the log (ctrl+shift+j)? Also, have you further addons installed? If so, please disable all of them and retry. If it works then, re-enable one by one to identify the one causing the problem.
Resolving incomplete - if you can provide the requested information and you're able to reproduce the issue with the current version of Lightning, feel free to reopen.