It looks like there's an issue with the newest revision of the module and nginx 1.2.3. When installed, whether gzip is on or off, the portion of code that was previously missing/not transmitted now gets transmitted, but isn't the actual page content. Instead it's gibberish with some of the raw nginx configuration mixed in.
An example of the code being output:
Xv±t™Xv±t™ ý ý w.google-analytics.com/urchin.js" type="text/javascript"> ct.asp">CONTACT US | PRIVACY POLICY | TERMS OF USE ccel-expiresx-accel-charsetx-accel-redirectstatusx-accel-bufferingx-accel-limit-ratex-accel-expiresx-accel-charsetx-accel-redirect¨Æ½/usr/scgi_temp@ǽ€Ç½ÀǽȽ@Ƚstatusx-accel-bufferingx-accel-limit-ratex-accel-expiresx-accel-charsetx-accel-redirectɽ/usr/scgi_tempÀɽʽ@ʽ€Ê½Àʽstatusx-accel-bufferingx-accel-limit-ratex-accel-expiresx-accel-charsetx-accel-redirecth˽/usr/scgi_temp̽@̽€Ì½À̽ͽstatusx-accel-bufferingx-accel-limit-ratex-accel-expiresx-accel-charsetx-accel-redirectÈͽ/usr/scgi_temp€Î½ÀνϽ@Ͻ€Ï½statusx-accel-bufferingx-accel-limit-ratex-accel-expiresx-accel-charsetx-accel-redirect(н/usr/scgi_tempÀнѽ@ѽ€Ñ½Àѽstatusx-accel-bufferingx-accel-limit-ratex-accel-expiresx-accel-charsetx-accel-redirectˆÒ½/usr/scgi_temp@Ó½€Ó½ÀÓ½Ô½@Ô½statusx-accel-bufferingx-accel-limit-ratex-accel-expiresx-accel-charsetx-accel-redirectèÔ½/usr/scgi_temp€Õ½ÀÕ½Ö½@Ö½€Ö½statusx-accel-bufferingx-accel-limit-ratex-accel-expiresx-accel-charsetx-accel-redirectH×½/usr/scgi_tempؽ@ؽ€Ø½Àؽٽstatusx-accel-bufferingx-accel-limit-ratex-accel-expiresx-accel-charsetx-accel-redirect¨Ù½/usr/scgi_temp@Ú½€Ú½ÀÚ½Û½@Û½statusx-accel-bufferingx-accel-limit-ratex-accel-expiresx-accel-charsetx-accel-redirectܽ
The actual HTML code does show up after a block of text like the one above, but it begins mid-string as though it must be a completely new chunk in the buffer. All subs_filter replacements have already occurred by the time it reaches the gibberish block.
Using 1.2.1 along with an older version of the module seems to work properly as Maxim had suggested. I'm happy to help continue to test this in any way possible.