So do I have to make a change in the brochure ror not?Even in the US capitalization varies after the colon, as you can see in the Wikipedia link: "The Chicago Manual of Style, however, requires capitalization only when the colon introduces a direct quotation or two or more complete sentences." American journalistic style does usually capitalize after a colon. Since in Canada, Britain and usually in Europe you don't capitalize after a colon I thought we could follow the Chicago Manual of style which is a more general style guide.
TBH the ONLY reason we (or at least I) use American English is because the default spell check is usually set to US in our web software, and most users also end up with that as default on English systems. So it has become somewhat of a digital standard, unfortunately Soon I will have to write 'nite' and 'lite' and 'cu' and 'ur'....
Dadeo.... I will say you are 99.9% right =) English is a VERY fluid language that has had more additions/changes in the last 10 years than in the last 200 years. That being said the new rule of the English language are "Does it look right?" and the lowercase E, albeit technically correct, does not look right. And when you consider that the upper case E is also technically correct and looks better, I think the choice is uppercase.
That being said this is a 'C' level (if that makes sense) detail. It is important, but seeing as how the argument can be made for either side correctly, I dont see a need to go out of the way to make changes to this retro-actively.. (ie changing any web graphcis) and if you are not going to change it there then you DONT want to change it on newer stuff.... consistency and unity is more important in this instance.
Just my two cents