Sorry, thread title a little melodramatic, but making sure is noticed :D
Seriously though, when tags initially rolled, individual "tags" were separated by a comma, rather than by a space (although commas still seem to work as well). The problem is that this updated format disallows a two-word tag, such as "Windows 7" - the space btwn the two creates two individual tags... the original tags rollout had no such issues.
Is there a reason for the changes, or is it possible to go back to the original tag format?
calamity