URL not displayed for journal articles
Calling the URL in CSL (e.g. <text variable="URL"/>) doesn't output the URL for journal articles, although it does work for the other items types I tested (newspaper articles, patents, books). This problem occurs both in csledit.xul as in bibliographies generated by Zotero 1.0.7.
a) this option (hiding the URL when the pages-field is filled) is currently active when unchecked. If the text of the option would be phrased in the negative, like "Hide/exclude URLs for paper articles in references", then the option would be checked when it's active, which IMHO is better UI design.
b) because this option is active in a standard Zotero installation, the formatting specified in the CSL styles is overridden by default. I understand that having this option may reduce number of required styles, but it does seem to undermine the purpose of CSL a bit: to be an interoperable standard which, independent of the implementation, results in a certain citation layout. As the option to exclude 'superfluous' URLs can also be implemented in CSL with the use of a conditional, I'm not convinced that this option should be included as a preference in Zotero.
On related default options issues--it may be better to have "Automatically tag items with keywords" off at least until unwittingly added tags can be easily deleted all at once. And it may be better to have "Automatically attach associated PDFs and other files" option turned on by default--some first users I know had blamed translators or slow connections for days before realizing they had to turn on the option to download files.
I also absolutely agree that URLs should be included by default and that Zotero should not by default (!) override the formatting specified in the CSL.