Infinate loop causes Fatal error: Maximum function nesting level of '100' reached, aborting!

Workaround is disabling pdir module or commenting $next = pdir_text_chuck($chunks, $i+1);
As mentioned in #3 i don't think it's a PHP bug. I tested on two completely different platforms (PHP 5.1,Linux and PHP 5.2,Windows).
Trace :

Fatal error: Maximum function nesting level of '100' reached, aborting! in \includes\common.inc on line 626
#	Time	Memory	Function	Location
1	0.0013	93688	{main}( )	..\index.php:0
2	1.5709	44243568	menu_execute_active_handler( )	..\index.php:18
3	1.5710	44244200	call_user_func_array ( )	..\menu.inc:348
4	1.5710	44244488	node_page_view( )	..\menu.inc:0
5	1.5710	44244768	node_show( )	..\node.module:1790
6	1.5710	44245384	node_view( )	..\node.module:1101
7	1.5710	44246088	node_build_content( )	..\node.module:1006
8	1.5873	44768664	node_invoke_nodeapi( )	..\node.module:1089
9	1.5873	44772208	excerpt_nodeapi( )	..\node.module:679
10	1.5873	44774072	check_markup( )	..\excerpt.module:69
11	1.5931	44782920	module_invoke( )	..\filter.module:457
12	1.5931	44784208	call_user_func_array ( )	..\module.inc:462
13	1.5931	44784704	pdir_filter( )	..\module.inc:0
14	1.5931	44785064	pdir_pdir( )	..\pdir.module:21
15	1.5931	44787296	pdir_text_chuck( )	..\pdir.module:35
16	1.5931	44787624	pdir_text_chuck( )	..\pdir.module:53
17	1.5931	44787952	pdir_text_chuck( )	..\pdir.module:53
18	1.5931	44788280	pdir_text_chuck( )	..\pdir.module:53
...