If you go to the compose window, and select Insert -> Characters and Symbols then you'll find that the drop-down boxes have no symbols in them. This appears to be a regression in 7. A quick look at the error console reveals: Error: malformed Unicode character escape sequence Source File: chrome://editor/content/EdInsertChars.js Line: 416, Column: 2 Source Code: "\u00f2\u00f3\u00f4\u00f5\u00f6\u014d\u014f\u0151\u01d2\u01eb\u01ed\u020d\u020e\u022b\u22d\u022f\u0231\u1e4d\u1e4f\u1e51\u1e53\u1ecd\u1ecf\u1ed1\u1ed3\u1ed5\u1ed7\u1ed9\u1edb\u1edd\u1edf\u1ee1\u1ee3", The "\u22d" bit seems to be the error - even my emacs picks that up as wrong. My guess is that something has got a bit stricter in 7, causing this to now be an error.

Comment on attachment 563337 [details] [diff] [review] One-byte fix Sorry, get the right Neil.

> My guess is that something has got a bit stricter in 7, causing this to now be an > error. Bug 663300: If \u is not followed by four hex characters it must be a syntax error (mutatis mutandis for \x)

Checked in and transplanted: http://hg.mozilla.org/comm-central/rev/6a05eb45b0a7 http://hg.mozilla.org/releases/comm-aurora/rev/59498d666732 http://hg.mozilla.org/releases/comm-beta/rev/3f18b245fd12

> status-thunderbird7: --- ➔ fixed Does this mean this will be fixed in the upcoming 7.0.1 release?

Verified fixed Mozilla/5.0 (Windows NT 6.1; WOW64; rv:7.0.1) Gecko/20110929 Thunderbird/7.0.1 (thus the answer to comment #5 is yes). Note that SeaMonkey 2.4.1 didn't pick up that fix (spun too early).