Recently I have started to receive strange error. It goes when I use left tree in admin panel. In some cases it goes wrong and afterwards I receive that message.
Bad Request
Your browser sent a request that this server could not understand.
Size of a request header field exceeds server limit.
Cookie: cookie_user_id=92210521; __utma=208750796.1072054669.1309535162.1309949510.1309951781.5; __utmz=208750796.1309535162.1.1.utmcsr=(direct)|utmccn=(direct)|utmcmd=(none); PHPSESSID=49d4742s3994n1s8qb5olmpqi7; ys-modx-resource-tree=a%3As%253A/root%5Es%253A/root/web_0/web_1%5Es%253A/root/web_0/web_8%5Es%253A/root/web_0/web_80%5Es%253A/root/web_0/web_40%5Es%253A/root/web_0/web_870%5Es%253A/root/web_0/web_872%5Es%253A/root/web_0%5Es%253A/root/web_0/web_3/web_17%5Es%253A/root/web_0/web_3/web_505%5Es%253A/root/web_0/web_3/web_79%5Es%253A/root/web_0/web_3/web_534%5Es%253A/root/web_0/web_3%5Es%253A/root/web_0/web_3/web_16/web_437%5Es%253A/root/web_0/web_3/web_16/web_438%5Es%253A/root/web_0/web_3/web_16/web_440%5Es%253A/root/web_0/web_3/web_16/web_439%5Es%253A/root/web_0/web_3/web_16/web_441%5Es%253A/root/web_0/web_3/web_16/web_442%5Es%253A/root/web_0/web_3/web_16/web_443%5Es%253A/root/web_0/web_3/web_16/web_446%5Es%253A/root/web_0/web_3/web_16/web_447%5Es%253A/root/web_0/web_3/web_16/web_467%5Es%253A/root/web_0/web_3/web_16/web_511%5Es%253A/root/web_0/web_3/web_16/web_468%5Es%253A/root/web_0/web_3/web_16/web_707%5Es%253A/root/web_0/web_3/web_16/web_708%5Es%253A/root/web_0/web_3/web_16/web_709%5Es%253A/root/web_0/web_3/web_16/web_710%5Es%253A/root/web_0/web_3/web_16/web_711%5Es%253A/root/web_0/web_3/web_16/web_712%5Es%253A/root/web_0/web_3/web_16/web_713%5Es%253A/root/web_0/web_3/web_16/web_714%5Es%253A/root/web_0/web_3/web_16/web_715%5Es%253A/root/web_0/web_3/web_16/web_716%5Es%253A/root/web_0/web_3/web_16/web_882%5Es%253A/root/web_0/web_3/web_16/web_884%5Es%253A/root/web_0/web_3/web_16%5Es%253A/root/web_0/web_3/web_10%5Es%253A/root/web_0/web_3/web_10/web_216/web_139%5Es%253A/root/web_0/web_3/web_10/web_216/web_140%5Es%253A/root/web_0/web_3/web_10/web_216/web_141%5Es%253A/root/web_0/web_3/web_10/web_216/web_142%5Es%253A/root/web_0/web_3/web_10/web_216/web_143%5Es%253A/root/web_0/web_3/web_10/web_216/web_144%5Es%253A/root/web_0/web_3/web_10/web_216/web_145%5Es%253A/root/web_0/web_3/web_10/web_216/web_512%5Es%253A/root/web_0/web_3/web_10/web_216/web_146%5Es%253A/root/web_0/web_3/web_10/web_216/web_148%5Es%253A/root/web_0/web_3/web_10/web_216/web_103%5Es%253A/root/web_0/web_3/web_10/web_216/web_104%5Es%253A/root/web_0/web_3/web_10/web_216/web_106%5Es%253A/root/web_0/web_3/web_10/web_216/web_115%5Es%253A/root/web_0/web_3/web_10/web_216/web_105%5Es%253A/root/web_0/web_3/web_10/web_216/web_107%5
The problem goes away only after cleaning cache.
System info: MODX Revolution 2.1.3-pl (traditional) mysql 5.1.50-lk-log utf8
Phpinfo in attachment
Related topics:
https://forums.modx.com/index.php?topic=55904.0
https://forums.modx.com/thread/30073/strange-error-in-2-02-advanced
Any ideas what can lead to this issue?