Using tab for indentation cause wrong indentation calculations when inserting snippets, though when spaces are used for indentation all looks good.

Steps to reproduce:
1. create PHP file with contents:
<?php
$a = array(1,
<TAB>2);

2. create snippet with name "i" and with expanding by hitting "TAB":
if($a) {
<TAB>{$cursor}
}

3. type in newly created file, right after all contents in a new line: i<TAB>

Actual results:
<?php
$a = array(1,
<TAB>2);
   if($a) {
<TAB>
}

Expected results:
<?php
$a = array(1,
<TAB>2);
if($a) {
<TAB>
}

Product Version: NetBeans IDE 6.9 (Build 201006101454)

Additional information:
Same bug appears when I trying to insert snippet in context like this:
<?php
class A {
<TAB>public function b{
<TAB><TAB>//insert here
<TAB>}
}

Wrong indentation in some cases can be fixed by pressing alt+shift+f, such as second example, but can't be fixed in first.

When I check "Expand Tabs to Spaces" in "Formatting" tab indentation inserting correctly.