I use both Linux and FreeBSD (specifically, I use Debian Linux and PC-BSD), and I found something weird about `sed`.

I frequently need to convert "tab separated values" files to "comma separated values". The simplest way I know is to use `sed`, like this:

```
sed 's/\t/,/g' inputFile.txt > outputFile.csv

```

This works perfectly on Linux: It replaces every tab with a comma... but on FreeBSD, it doesn't replace anything!!!

Am I missing something? Is there a syntax with FreeBSD `sed` that is different to the one on Linux?