The server company sent this to me and asked that I ask the software creators about this......

Looks like mod_security is blocking the requests with the following:

[Thu Jul 31 11:01:07 2008] [error] [client 38.99.161.194] ModSecurity: Warning. Match of "rx (?:\\\\b(?:(?:i(?:nterplay|hdr|d3)|m(?:ovi|thd)|(?:ex|jf)if|f(?:lv|ws)|varg|cws)\\\\b|r(?:iff\\\\b|ar!B)|gif)|B(?:%pdf|\\\\.ra)\\\\b)" against "RESPONSE_BODY" required. [id "970902"] [msg "PHP source code leakage"] [severity "WARNING"] [hostname "www.jamaicans.com"] [uri "/forums/ubbthreads.php"] [unique_id "@x9qzwoLCgIAAF@55R0AAABK"]
[Thu Jul 31 11:01:09 2008] [error] [client 72.12.29.207] ModSecurity: Warning. Match of "rx (?:\\\\b(?:(?:i(?:nterplay|hdr|d3)|m(?:ovi|thd)|(?:ex|jf)if|f(?:lv|ws)|varg|cws)\\\\b|r(?:iff\\\\b|ar!B)|gif)|B(?:%pdf|\\\\.ra)\\\\b)" against "RESPONSE_BODY" required. [id "970903"] [msg "ASP/JSP source code leakage"] [severity "WARNING"] [hostname "www.jamaicans.com"] [uri "/forums/ubbthreads.php?ubb=postlist&Board=8&page=1"] [unique_id "@0Ku6woLCgIAAF@55TkAAABt"]