Several errors in logs since 1.1.1

[ABerglund]

We moved from 1.0.2 to 1.1.1 recently, and I'm seeing several different errors in the RC error log. Not sure if these are config issues or true bugs. Would like to get input here prior to creating a bunch of tickets in Trac.

Here are some examples, all of them happen repeatedly, not just one-off errors.

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PHP Warning:  rewind(): stream does not support seeking in <rc-root>/program/lib/Roundcube/rcube_message.php on line 246
This one causes an error display on logout for Firefox 3.6.12, seems to happen on several different operations as well.

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PHP Error: Request security check failed (GET /webmail/?_task=logout)

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PHP Error: Invalid compose ID in /hpsw/web/configs/roundcubemail-1.1.1/program/steps/mail/compose.inc on line 51 (GET /webmail/?_task=mail&_id=11162026535509d50c26fc6&_action=compose)
Any thoughts on any of these?

RC version is 1.1.1 (release)
PHP 5.4.38
Apache 2.2.3
MySQL 5.0.95

[ABerglund]

It appears that at least the "security check" errors were related to not having the legacy_browsers plugin enabled. Indeed, after enabling that, I'm not seeing the others right now, either. Too soon to say for sure, I suppose.

[ABerglund]

The PHP rewind() warning still appears at times.