yet another longass post to keep you informed. the latest nightly has a couple extra files, one with changes from .4 -> .5
here is the content.
New and improved features in Chimera 0.5
The following bug fixes and improvements have been made since Chimera 0.4:
A downloading dialog is shown now, for file downloads, and when saving pages. A number of bugs were fixed, related to the download file disappearing, and downloading BinHex files.
Importing of bookmarks files containing illegal characters was made more reliable, and can no longer leave you with a corrupted bookmarks file.
Fixed display of non-Roman characters in bookmarks text in the UI.
Changed forward/back and next/previous tab keyboard shortcuts, to avoid conflicting with the use of Command-arrow key combinations for text navigation.
The search page (loaded in response to Go->Search Page) uses the Internet Config setting now. Unfortunately, Apple removed UI for that setting from the Internet system preferences pane in Mac OS 10.2 (Jaguar). See the Known issues section below for a workaround.
Improved dragging of links from browser window; page links can now be dragged onto other tabs, into the bookmarks sidebar, and onto the bookmarks toolbar.
Improved drag and drop of bookmarks, and items on the bookmarks toolbar, which can now be reordered, dragged to the trash to delete them, and cloned with option-drag.
Fixed some issues that caused a multi-line bookmarks toolbar to display incorrectly.
Performance is much better with large numbers of tabs open. The tabs are now all equal width, and can show the site icon (which is draggable).
You can now drag bookmarks and links to tabs, and drag from tabs to other tabs or bookmark locations (click on the tab icon to drag). Dragging into the background area behind the tabs will create a new tab.
New tabs now always appear on the right-hand side of the tabbed browser view, because having tabs appear next to the current view confused some users.
Added site icons (favicons) for the url bar, and tabs. You can also make them visible for bookmarks by setting the pref browser.chrome.favicons to true in prefs.js, but this can cause some page-loading delays at startup.
The Build ID, which identifies the day the build was made, is shown on the splash screen, and in the About window now.
Added some updated icons for various toolbar buttons.
Added the Universal Character set detector, which improves the display of pages in non-Roman character encodings.
Updated Chimera to use a more recent version of the Mozilla 1.0 code, which brings with it changes in many parts of the code, many of which are security related.
On quitting, the prefs.js file is backed up now to prefs.bak.
Several fixes make the Java plugin more stable now, particularly on Mac OS 10.2.
Some other plugin drawing and stability fixes were done.
Changed the package layout of the Navigator package to allow for localizations.
Fixed some issues with linebreaks, and Unicode data, when copying and pasting between Chimera and other applications.
Holding down the shift key while clicking the reload button always fetches the page from the server now.
XHTML files are loaded correctly now.
Typing in Japanese and other multi-byte languages mostly works now.
Known issues
Cosmetic issues occur with many plugins, especially if you switch tabs on pages with plugins. Some stability issues affect plugins; visiting pages with some plugins can crash.
Sometimes, on Mac OS 10.2 (Jaguar), Navigator wont stick as your default browser. If you have this problem, try removing the following files:
~/Library/Caches/com.apple.LaunchServices.UserCache.csstore (where ~ is your Home directory)
/Library/Caches/com.apple.LaunchServices.LocalCache.csstore
and reboot your machine.
Typing in Japanese, and other multi-byte languages, is not fully implemented yet.
You may see some redraw issues when pasting into textareas, and doing Find Again. Resizing the window will correct these.
Sometimes, a background window will pop to the front when its page finishes loading.
For reasons not yet understood, Chimera will sometimes use a lot of CPU time for a few minutes, then gradually reduce to its usual low CPU usage. This seems to happen mostly after waking from sleep.
The Fonts tab of the Appearance prefs pane is work in progress. In particular, the font sizes can interfere with eachother, and sometimes the fonts default back to Lucida Grande.
Services support isnt fully implemented in the web content yet.
There is no way to export bookmarks to HTML at present.
Dragging an image to the Finder doesnt do the right thing.
In Mac OS 10.2 (Jaguar), form buttons sometimes draw incorrectly (with a horizontal stripe).
Trying to import a large bookmarks file sometimes fails to import all of the bookmarks. Breaking the file into a number of smaller files should help.
After doing a View Source on a page, you cant save the page source. As a workaround, Select All and Copy.
There is no History visible in the UI by default. You can make the History tab in the sidebar visible by adding this line to your prefs.js file in the Chimera profile folder:
user_pref("chimera.show_history", true);
The Go->Search Page command always loads an excite.com url in Mac OS 10.2 (Jaguar), and there is no system UI to change it. As a workaround, you can edit a string in the Navigator package to set your preferred search page. Context-click on the Navigator icon, and choose Show Package Contents. In the resulting Finder window, go down into Contents/Resources, and open the WebsiteDefaults.strings file in your favorite text editor. On the line containing SearchPageDefault, remove the /* at the start, change
http://www.dmoz.org to your preferred search site, and delete everything after the semicolon. Then save the file.
After blocking popups for the first time, there is no way to have popups show up again. If you need popups to work (say, to access a site that requires them, edit your prefs.js file, changing the line that contains dom.disable_open_during_load to:
user_pref("dom.disable_open_during_load", false);
OmniWeb is pretty good. IE is OK. Moz is really cool if you like a lot of features, etc. Im ready for Chimera 1.0. 
