Allow richtext commenting on blog [closed] - blogs

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Is there any security issue in allowing richtext commenting on blog for public visitors?
Is there any blog system that actually supports richtext commenting?
Can anyone advise?

You can always allow Markdown syntax. That way your users can do basic richtext formatting, but still be secure because no HTML code would be allowed.

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web page aesthetics for address validation [closed]

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I'm asking more of a CSS question I want to design my webpage since all of the functionalities are now working, as you can see in the image below my webpage is quite plain. How can I improve the my webpage to make it more pleasing. Any suggestions, Opinions and CSS sites are appreciated tnx.
The best way to improve your app design, IMO, is to ask a pool of potential users what they think and how will they use.
See http://www.uxteam.com/blog/focus-groups-vs-usability-testing/
DISCLAIMER : but maybe not here in SO :-)

Search result in Google [closed]

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In the image below I have a search results from Google. I wonder what this type of detailed search result is called and how it's done? Thanks!
You're talking about sitelinks. Please have a look to: http://support.google.com/webmasters/bin/answer.py?hl=en&answer=47334
As stated in the article, it is not something you can force, Google decides whether your site is worth to have them or not.

Is HTML allowed in objects description? [closed]

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Is it possible to use HTML tags in objects description, like links? I am trying to post a link on the wall with my app but it skips HTML stuff.
With regard to your question - no. You can't use HTML tags at all when posting data to Facebook.

is mupdf pdf library really open-source GPL? [closed]

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I cannot find fitz.c file in mupdf folders. I can find fitz.h but, for example, I am not able to inspect the function
void fz_debug_obj(fz_obj *obj);
in detail, and other things I need.
Is it possible that some proprietary code is there so that using mupdf is not legal and they sue you when you make a derived work?
mupdf's full source is available via git at git://git.ghostscript.com/mupdf.git or in tar.gz format http://mupdf.googlecode.com/files/mupdf-0.9-source.tar.gz via http://code.google.com/p/mupdf/downloads/list.

HTML Tidy license question [closed]

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I'm looking to use the HTML Tidy source code and modify it to add a few more features. Having read the license, I'm not quite sure if I will have to release the source of my modified application? I don't want to.
No, you don't have to. This is just a normal BSD-style licence.