Elon Musk changed up his much-derided new 'X' Twitter logo by making the lines a teeny bit thicker, then almost immediately changed it back

• Elon Musk announced Twitter would be rebranding to X on Saturday.
• Then he introduced a new logo, which looks suspiciously similar to a standard Unicode symbol.
• Now, there's another one which has thicker lines — but Musk says he doesn't like it.

Twitter is rebranding to X, but Elon Musk still can't decide what the logo should be.

The company subtly introduced a new version of the X on Tuesday, which is very similar except for thicker lines.

It replaced the original ???? logo which rolled out on Monday, that looks suspiciously similar to a generic Unicode character.

Some people had also speculated that it was lifted from the Monotype font "Special Alphabet 4" — but its executive creative director told the Financial Times that wasn't the case.

While the logo has been updated on the Twitter homepage, the company's official account is still using the old one. 

But this new version doesn't look set to last very long either. 

"I don't like the thicker bars, so reverting," Musk tweeted. "The logo will evolve over time."

The rebrand also irritated former Twitter employees, who deplored the X logo appearing on their LinkedIn profiles.

Since then, Twitter has reversed its LinkedIn logo back to the original blue bird — one of the last remnants of the brand.

Current staff have been helping to dismantle bird icons at the company's San Francisco headquarters, one of which broke and is still attached. 

The sign outside the office reads only "er," after police stopped removal work to investigate "a possible unpermitted street closure." They found there was no crime committed, but the removal is yet to be continued.

Several Twitter users have also said the X brand reminds them of a porn website — a complaint the original X.com faced as well.

Elon Musk wanted to keep the name when his online bank merged with PayPal, but focus groups had suggested it "conjured up visions of a seedy site you would not talk about in polite company," per Walter Isaacson's upcoming biography.

Twitter did not immediately respond to Insider's request for comment.