# Nginx-0.8.16

**URL:** <https://www.ruby-forum.com/t/nginx-0-8-16/175914>\
**Category:** NGINX\
**Created:** [September 22, 2009, 7:56pm UTC](https://www.ruby-forum.com/t/nginx-0-8-16/175914 "2009-09-22T19:56:27Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![imixaly4](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/i/3ab097/32.png) [@imixaly4](https://www.ruby-forum.com/u/imixaly4)\
**Post date:** [September 22, 2009, 7:56pm UTC](https://www.ruby-forum.com/t/nginx-0-8-16/175914/1 "2009-09-22T19:56:27Z")

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Changes with nginx 0.8.16 22 Sep  
2009

```
*) Feature: the "image_filter_transparency" directive.

*) Bugfix: "addition_types" directive was incorrectly named
   "addtion_types".

*) Bugfix: resolver cache poisoning.
   Thanks to Matthew Dempsky.

*) Bugfix: memory leak in resolver.
   Thanks to Matthew Dempsky.

*) Bugfix: invalid request line in $request variable was written in
   access_log only if error_log was set to "info" or "debug" level.

*) Bugfix: in PNG alpha-channel support in the
   ngx_http_image_filter_module.

*) Bugfix: nginx always added "Vary: Accept-Encoding" response 

```

header  
line, if both “gzip\_static” and “gzip\_vary” were on.

```
*) Bugfix: in UTF-8 encoding support by "try_files" directive in
   nginx/Windows.

*) Bugfix: in "post_action" directive usage; the bug had appeared in
   0.8.11.
   Thanks to Igor Artemiev.
```

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<div class="post-metadata">

**Author:** ![imixaly4](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/i/3ab097/32.png) [@imixaly4](https://www.ruby-forum.com/u/imixaly4)\
**Post date:** [September 23, 2009, 12:38am UTC](https://www.ruby-forum.com/t/nginx-0-8-16/175914/2 "2009-09-23T00:38:38Z")

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On Tue, 2009-09-22 at 18:42 +0400, Igor S. wrote:

> Changes with nginx 0.8.16 22 Sep 2009
> 
> ```
> *) Feature: the "image_filter_transparency" directive.
> 
> ```

Hi Igor,

Can I get a description and example for the wiki?

Cliff

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**Author:** ![imixaly4](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/i/3ab097/32.png) [@imixaly4](https://www.ruby-forum.com/u/imixaly4)\
**Post date:** [September 23, 2009, 12:41am UTC](https://www.ruby-forum.com/t/nginx-0-8-16/175914/3 "2009-09-23T00:41:33Z")

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On Tue, Sep 22, 2009 at 02:02:21PM -0700, Cliff W. wrote:

> On Tue, 2009-09-22 at 18:42 +0400, Igor S. wrote:
> 
> > Changes with nginx 0.8.16 22 Sep 2009
> > 
> > ```
> > *) Feature: the "image_filter_transparency" directive.
> > 
> > ```
> 
> Hi Igor,
> 
> Can I get a description and example for the wiki?

image\_filter\_transparency [on|off]  
default is on.

The directive allows to disable image transparency in GIF and  
palette-based PNG to improve image resampling quality. True color PNG  
alpha-channels are always preserved despite this setting.  
Did not check grayscale PNG, however, I believe it should be handled  
as truecolor PNGs.