Impact of upgrade of SAP R3 source system on BW system

Hi Experts,
Could you please help me to list down the impacts on BW system due to upgrade of SAP R3 source system?
[1] Is there any impact if R3 is upgraded to Unicode restricted version from a version where Unicode restriction was not mandatory?
[2] With respect to delta loads what will be the threat?
[3] With respect to Business contents modifications by SAP's new upgraded version, can be there be any threat?
Any inputs will be appreciated... Thanks in advance!
Regards, Somenath

Please specify which version of BW u r using.
A direct upgrade to ECC6.0 is possible from a minimum lower version of R/3 3.1i and not below that and coming to BW an upgrade to BI 7.0 is possible from a minimum lower version of BW 3.0B and not below that.
The compatibilty is possible with an addition of some Plug -In's or Patches.
There will not be much of problem,

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    peres () From: to
    peres () From: to
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    I am inactivating this SR, as the OracleAS Data Source Plugin for Omniportlet for SAP is a sample released for test, evaluation, and ed
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    I don't believe this is the right section however I am having an issue with the app store. This problem has been going on for a while and I've just put it off for a while. I seem to be able to download and install apps fine but can no update them. Wh