Commas instead of spaces for tags breaks my muscle memory. It often saves my bookmarks with no tags at all because of it.
I am continually tempted to rewrite it (or, more likely, its predecessor, which did more for fewer users.)
Yahoo's one was slow and a dead-end but enough good remained that I could get by.
This one is incoherent and sloppy. It doesn't feel like the people developing it have much understanding of (or passion for) the space.
Commas instead of spaces for tags breaks my muscle memory. It often saves my bookmarks with no tags at all because of it.
I am continually tempted to rewrite it (or, more likely, its predecessor, which did more for fewer users.)