Hola Mr. Antu Biskut,
I've yet to solve COPY & PASTE problem for my Yahoo Business Mail Account via Internet Browser. Since day 1 I'm facing the problem using the default Internet Browser for SGN, I've been downloading almost every alternative Internet Browser in Android Market such as follows:
1. Firefox - Can Copy text but there is no Paste function at the Email Compose Area. The Compose areas seem to be freeze and cannot input any text for body email but can fill in the recipient name & email subject. Basically the Copied Text will be copy to clipboard and can be paste to other application of SGN EXCEPT in the same Internet browser.
2. Opera Mini Browser - Same problem as above.
3. Skyfire - Same problem as above - Same problem as above
4. Dolphin Browser HD - Same Problem as above
5. Ninesky Browser - Same Problem as above
6. Yahoo! Mail App - Do not support my Yahoo Business Mail
As alternative, I had to configure Pop3 Account of my Yahoo Business Mail using the default Email App on SGN which is very dull (coz only can compose Plain Text). What I want is Rich HTML Email Format in composing price quotation to clients.
The funny thing that I still don't understand is how the sales person of Samsung Kiosk at Level 3, AEON Tebrau City, JB (nearby Machines) can do the COPY & PASTE text action successfully within the default Internet Browser.
No point of having SGN but doesn't solve my problem to email on-the-go. Back to square one sending out emails using my MacBook. I thought I could leave my MacBook at home and just carry this wonderful multi-tasking gadget and do all my tasks while on-the-go. Pray hard for a solutions. I would be extremely happy if any of you guys could advise me on this.

Added on April 2, 2012, 7:43 amHi Linux_Osx,
Thank you for your well said direction. Will go to the 1st page now.

The easier way is bring back to that place and ask the salesperson to show you how to do it....