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Re:You cannot start a tweet with “D. Tusk” by Dylan16807 on Monday July 13, 2015 @04:02PM (#9880662)
The fact that "D Name" starts a direct message doesn't explain why "D. Something" gives an error, except for shoddy coding.
Re:You cannot start a tweet with “D. Tusk” by burke on Monday July 13, 2015 @05:08PM (#9881104)
It's probably so that people don't accidentally publish something they intended to DM by tapping the spacebar twice after the command. It'd still imagine it should be allowed from a full keyboard, at least.
Re:You cannot start a tweet with “D. Tusk” by darklajid on Monday July 13, 2015 @05:31PM (#9881262)
Nice idea, but 'internal server error' (per the linked tweet, didn't try it) isn't exactly a good reaction. IF someone thought that this might make sense, the result should not/would not be a 500..
Re:You cannot start a tweet with “D. Tusk” by glass_of_water on Monday July 13, 2015 @09:39PM (#9882339)
It could be that an internal service is returning an error, which the externally facing server is not handling properly.
Re:You cannot start a tweet with “D. Tusk” by logicallee on Monday July 13, 2015 @08:10PM (#9882031)
yes, absolutely! It has to be this. Plus, a tiny little period is really hard to miss on mobile (where the shortcut you mention applies). it's almost justified.
Re:You cannot start a tweet with “D. Tusk” by personjerry on Monday July 13, 2015 @05:12PM (#9881128)
That's an interesting idea but very speculative.
Re:You cannot start a tweet with “D. Tusk” by Dylan16807 on Monday July 13, 2015 @06:45PM (#9881667)
Allowing multiple spaces makes sense, I suppose, but why support a dot stuck there? Seems like an oversight.
Re:You cannot start a tweet with “D. Tusk” by Maome on Monday July 13, 2015 @06:51PM (#9881688)
On many mobile keyboards double space turns into '. ' as a quick way to begin a new sentence.
Re:You cannot start a tweet with “D. Tusk” by msftie on Tuesday July 14, 2015 @03:20AM (#9883284)
"d. something" is not the only offender. I suspect it's a badly written parser. "m. anything" also breaks. And for fun, without the following word ("something"), the tweet just vanishes with no error at all.

I tried all of the non-space non-alphanumeric characters on my keyboard. Some worked, most caused an error.

d` d~ d$ d% d^ d& d( d) d- d+ d[ d] d{ d} d| d; d' d" d, d< d. d> d/ d?