Global variables "forgetting" their values in current CVS ?

something has changed since friday that makes my application non-functional producing incomplete output and even "Document contains no Data" pages i have tracked it done to this part of code at the very end of the main application script ... 191: // Kopf- und Fußteil vorbereiten 192: error_log(__FILE__.":".__LINE__." body: ".strlen($body)."\n",0); 193: $pagehead = getfile($templatedir . "/page/head.inc"); 194: error_log(__FILE__.":".__LINE__." body: ".strlen($body)."\n",0); 195: $pagefoot = getfile($templatedir . "/page/foot.inc"); 196: 197: error_log(__FILE__.":".__LINE__." body: ".strlen($body)."\n",0); 198: $have_imap = ($session_global["protocol"]=="IMAP4")?true:false; 199: error_log(__FILE__.":".__LINE__." body: ".strlen($body)."\n",0); 200: 201: // Ausgabe von Kopf, Körper und Fuß 202: error_log(__FILE__.":".__LINE__." body: ".strlen($body)."\n",0); 203: if(is_String($body)) 204: { ... this part of code produces the following output in .../logs/error_log: [Mon Dec 20 11:44:13 1999] [error] /home/hholzgra/public_html/webmail/service.php:192 body: 833 [Mon Dec 20 11:44:13 1999] [error] /home/hholzgra/public_html/webmail/service.php:194 body: 833 [Mon Dec 20 11:44:13 1999] [error] /home/hholzgra/public_html/webmail/service.php:197 body: 833 [Mon Dec 20 11:44:13 1999] [error] /home/hholzgra/public_html/webmail/service.php:199 body: 0 [Mon Dec 20 11:44:13 1999] [error] /home/hholzgra/public_html/webmail/service.php:202 body: 1 [Mon Dec 20 11:44:13 1999] Script: '/home/hholzgra/public_html/webmail/service.php' --------------------------------------- zend_execute_API.c(148) : Block 0x08243480 status: Beginning: Cached (allocated on var.c:263, 12 bytes) End: OK --------------------------------------- zend_execute.c(1962) : Freeing 0x0826FE00 (12 bytes), script=/home/hholzgra/public_html/webmail/service.php Last leak repeated 7 times so the $body variable is destroyed by the assignment on line 198 and it even changed its value between lines 199 and 202 which are identical error_log()-calls with nothing but a comment inbetween further investigation shows that $body may loose its value as early as between line 192 and 194 depending on the work the script has done before, and sometimes it even may finnish without problems but the problem is reproducabe: passing identical parameters makes it loose $body in the same place in every run any ideas ???