Thunderbird and messages signatures

While working with Thunderbird, I have found a bug: whatever location you define for an identity signatures, they will be always located in the bottom of the replied / forwarded message.

Obviously, this is not convenient at all, but the solution is very simple: open Thunderbird menu
Tools --> Options --> Advanced Tab --> General, press "Config Editor..." button
In the long list which opens, find anything which starts from 'sig_bottom' (it will be one line per each identity you have defined) and double click these lines, thus replacing their values from 'false' to 'true'.

This solution was originally posted here and mentioned here

Thunderbird and Google Calendar

It is perfectly possible to configure Thuderbird 2.x to work with Google Calendar.
I had to install 2 Mozilla Thunderbird extension: Google Calendar Provider and Lightning (both of them are required).

Then go to Calendar view and select "Calendar-> New Calendar..."
It opens a wizard. Select there "On the Network" option, then select "CalDav" (second option) at the next screen and when you see "Location" field, which is the most tricky part of this setup,
insert there https://www.google.com/calendar/dav//events

More details are here, but actually the described is enough to get your remote Google calendar working in the Thunderbird

What's cool: you do not have to install Mozilla Sunbird to get this work!