_GET arguments question

Hi, just a quick question: I'm writing a script, where arguments get added to a dynamicaly created URL. The only problem is that if there are no arguments in the URL already I get the following: http://localhost/dir_to_my_script/test.php?&arg1=1&arg2=2 notice the "?&" bit. I'm just curious, since it's working just fine in any major browser, are there any known problems which could occur by using the "&" right after the "?" character? Regards, Hendrik