I meant to comment on this sooner, as the initial release of SugarCRM 6.3 BETA was made available late last week and whenever this happens, a large portion of the community immediately downloads it and installs it.
It seems with every release, it is necessary to remind the community at large that BETA releases such as this one are intended for testing purposes ONLY. They should only be used for circumstances where, for example, one is curious about seeing the new functionality or perhaps contributing to testing efforts.
This should always be done using an install that is separate from your production instance. If you must test it with your data, create a copy of your production instance and upgrade the copy of your production instance. Do not upgrade your production instance to the BETA release.
You will find that BETA versions cannot be upgraded. Thus, whichever BETA version you install cannot be upgraded to BETA 2, BETA 3 or even the actual release version of the target version. As a result, if you upgrade your production system to a BETA version, such as 6.3 BETA, you will be stuck with that version and the onus will be on you to figure out how to upgrade it.
This could put you in a difficult situation as you might encounter problems with the BETA that hamper your usage of the system and the only recourse you will have available to you is your own ability to troubleshoot and resolve the problem.
In short, use BETA versions for their intended purposes ONLY: testing.