l4g won't flush buffer?

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What steps will reproduce the problem?
I do not have a specific steps to reproduce the issue because it occurs in a 
very complicated project which I cannot share.
Sometimes the l4g won't output the error/debug messages to StdOut or whatever 
file I redirect the stream to
But if I add a fmt.Println("whatever text"), the error will appear in the 
output.
I tried to call l4g.Close(), but it doesn't help.
I think it might be buffer flush issues.
Could you please check?

Original issue reported on code.google.com by Awake...@gmail.com on 7 May 2012 at 5:19