Wow, that was fast, Gapan updated them almost immediately. Thanks, you guys are efficient!
Also, thanks to Thenktor and everyone else in this thread.
@laci: If 11.50 also includes security fixes then sure I'll probably request 13.1, 13.37 and current are updated because as you say, there is only one supported Opera version and users shouldn't be left vulnerable. However, if there are no security fixes then I suppose I should only request that current is updated. Users of 13.1 and 13.37 can always get the latest package from SlackBuilds, the current repository or use my op2slk conversion script anyway.