Macro browser does not load in Safari when using mod_deflate in a reverse proxy, with "Compress HTTP Responses" turned on

Symptoms

When the following conditions are true:

1. Confluence is accessed via a reverse proxy
2. The reverse proxy is Apache httpd with mod_deflate enabled
3. Confluence has "Compress HTTP Responses" enabled in General Options

The macro browser will not display in Safari, instead displaying a JavaScript error message (see attachment). This works fine without any errors in Google Chrome. Currently this only affects 4.3.2, as the exact same configuration with 4.3.1 does not have this issue.

Steps to Reproduce

1. Set up Confluence, making sure the "Compress HTTP Responses" option is enabled in General Configuration (it is by default)
2. Set up a reverse proxy server, enabling mod_deflate, for example with the following configuration:

   LoadModule deflate_module /usr/libexec/apache2/mod_deflate.so
   AddOutputFilterByType DEFLATE text/html text/plain text/xml
   AddOutputFilterByType DEFLATE text/css
   AddOutputFilterByType DEFLATE application/x-javascript application/javascript application/ecmascript text/javascript text/ecmascript
   AddOutputFilterByType DEFLATE application/json text/json
   AddOutputFilterByType DEFLATE application/rss+xml

3. Connect to Confluence via the reverse proxy, using Safari
4. Try to insert a macro into a page with the macro browser, and observe the error

Workaround

The following methods can get around the issue:

1. Disable "Compress HTTP Responses" in Confluence General Configuration
2. Disable mod_deflate in Apache httpd
3. Use a browser other than Safari