Here is an extract from Yahoo! Search BOSS YDN

BOSS (Build your Own Search Service) is Yahoo!’s open search web services platform. The goal of BOSS is simple: to foster innovation in the search industry. Developers, start-ups, and large Internet companies can use BOSS to build and launch web-scale search products that utilize the entire Yahoo! Search index. BOSS gives you access to Yahoo!’s investments in crawling and indexing, ranking and relevancy algorithms, and powerful infrastructure. By combining your unique assets and ideas with our search technology assets, BOSS is a platform for the next generation of search innovation, serving hundreds of millions of users across the Web.

I’ll try to experiment a bit on it, to see if i can get to integrate the search on this blog for a small…
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Therefore to solve this problem the simple solution for that is to modify your robots.txt file in your root directory

and add the following at the end

Disallow: /ScriptResource.axd
Disallow:/WebResource.axd

With this no more issues regarding invalid padding.

If this does not solve your issue you can take a look at what other users propose here.

Some update on this issue, i found out while googling some days back:

On this post you can find out how to compress the webresource.axd and also somewhere in between prevent this error to occur.
http://mironabramson.com/blog/post/2007/10/New–Shiny–WebResourceaxd-compression-Module.aspx

Use the tool found at the website below to generate a machine key and a decryption key:
http://www.orcsweb.com/articles/aspnetmachinekey.aspx

IBM and Yahoo! make information actionable with a simple,
no-charge enterprise search solution.

I have been able to play a few month with the OmniFind Yahoo! Edition from IBM, it’s quiet some powerful tool offered for free compared to the other search engines that are offered on the net such as Google Custom Search Business, Google Mini, ISYS Web, Mondo Search, and some other tools that are listed here(http://www.searchtools.com).

Here are the features of OYE (OmniFind Yahoo! Edition)

Search internal web sites, local and remote file systems, and the public web

• Search up to 500,000 documents and 5 separate collections
• Support for 200+ file types
• Search in 30+ languages
• Translated into 15 languages View Screen Shot

Intuitive out-of-the-box user interface with advanced features

• Based on Yahoo! Search UI View Screen Shot
• Easily customized with graphical tools to configure look-and-feel, UI elements, branding View Screen Shot
• Spell suggestion
• Full wildcard support

Increased relevancy of results

• Configurable synonyms and featured links View Screen Shot
• Tunable relevancy controls View Screen Shot
• Top queries, no results, and result click through reporting to enable fine-tuning View Screen Shot

Easy to deploy, configure, and maintain

• No prerequisites
• 3-click installer
• 1-click startup
• Go from the installer to searching in minutes

Open and extensible

• Built on Apache Lucene
• Open URL-based APIs (REST)
• Define, populate and search your own custom fields
• Easily embeddable and customizable UI output (XML/XSTL/HTML, HTML snippets)

From my point of view the only inconvenience with this tool is that is not open for any plug in or add in functionalities. That could really help make it much much better for users. But again, this tool is complete and contains all the needed functionalities for an Entry Level Enterprise Search Engine.

Here are some screen shot of the new version of the new version of OmniFind that i just upgrade from the 8.4.1