Developing Open Source Software

Hi,

I wish to know the general or mostly accepted practice of working with
Open Source Development while you are working in a commercial project
as your day job.  Please share your thoughts about the following points:

* When you work on an Open Source project after your usual job hours
is this approved by the employer?

* When you work on Open Source project in time other than the work
hours can that be taken as and declared by Employer, that the Employer
supports Open Source projects?

* If you develop a open source project with license like LGPL is it
allowed by the Employer to use that LGPL library in commercial project
you are working?

* What is the recommended practice followed by most software
professionals who contribute to Open Source projects in terms of
working hours?

I have just put some of my questions as points, please share anything
you can so it becomes easy for me to proceed further in my Open Source
journey.  The answers will also tell me the philosophy of current
professionals towards Open Source and Commercial projects.

Thanks in anticipation

with regards
Tushar

Tushar Joshi, 
tusharvjoshi at gmail dot com
Infospectrum India Private Limited
http://www.info-spectrum.com