Importing to Google calendar fails due to to much "\n" 's

Could you please provide an example .ics file which is causing this problem? Also, please take a screenshot of the error you're getting from Google, and attach it to this issue.

Hmmm, I see the problem. That extra newline at the beginning of the file does not belong.

I've seen this kind of problem before, though. It's almost certainly a bug in another one of your modules, which is accidentally including the php end tag (?>) at the end of one of its files. Including that tag leaves open the possibility that there is some whitespace after it, which causes this problem.

I would suggest searching for "?>" within all the .module, .inc, and .install files within your site's codebase, and looking for files which have it at the end of the file. Delete it from those files (there's probably only one of these), and this problem should go away.

If that doesn't work, let me know.

The only other thing I can think of is to clear your cache, as the version of the .ics file with extra whitespace may have gotten cached.

If that doesn't work, disable other modules until the whitespace goes away. That will tell you which module is the culprit.

Closing this as the problem was on the individual site and isn't a general problem with the module.